[PyMOL] Iterate scenes smoothly

Dear users,

     I'm trying to make a movie during which a surface changes its color. I
followed the tutorials from the wiki and successfully created two scenes
with the desired colors.
     However, I can't make them iterate smoothly. Instead, The first half
of the frames display the first scene and the second half the second scene.

     I'm using the following commands:

mset 1x 60
scene 001, store
scene 002, store
frame 1
mview store, scene=001
frame 60
mview store, scene=002
mview interpolate

    Also, the scenes doesn't change smoothly when I press PgUp/Down.

     Am I doing something wrong?

Best regards,
Leandro