For some reasons now the frame rate is 50 in the level and alson the menu, first it was 50 in the menù and 30 in the level.
I just stopped the music of the menù before the start of the level o_o
edit: aw, i still have the can't load in the same frame problem when i load the menu at the end of the level.
edit2: oh, don't know why, now the frame rate is 30 and it's really slow, why?