spiderMan issue

version:1.2
revision:6654
windows version

issue 1
for isolate issue, i disabled all plugin, just keep spiderman, following are steps
1. set target url
2. open w3af, only enable spiderman plugin, click run
3. w3af reminds me spiderMan proxy is running on 127.0.0.1:44444.
Please configure your browser to use these proxy settings and navigate the target site..
4. i do it for follow step 3
5. continue access my target test url
Result
1. it still response 400 bad request, i checked request, after request itself, w3af also append some unicode like char with it.
This is not most terrible issue, no 2 is

Issue 2
after several trys for issue, i finally got an ultimate issue,when i do step5 after 1 to 4 samely with issue 1, my explorer gave me following instruction
w3af proxy error: xUrllib found too much consecutive errors. The remote webserver doesn't seem to be reachable anymore. [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5458.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5459.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5460.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5461.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5462.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5463.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5464.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5465.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5466.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')] [Errno 2] No such file or directory: 'C:\\Users\\wuyibo\\.w3af\\tmp\\27352\\db_defaultSession-2013-Mar-25_13-14-01_traces\\5467.trace.lock' [('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\xUrllib.py', '503', '_send'), ('C:\\Program Files\\w3af\\Python26\\lib\\urllib2.py', '397', 'open'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '99', 'http_response'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\url\\handlers\\localCache.py', '362', 'store_in_cache'), ('C:\\Program Files\\w3af\\w3af\\core\\data\\db\\history.py', '318', 'save'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '87', '__enter__'), ('C:\\Program Files\\w3af\\w3af\\core\\controllers\\misc\\FileLock.py', '59', 'acquire')]

Please help, thank u very much