My paix pro is acting funny!! It doesn't remember the transposed tracks, and also, in the middle of the song (while recording) it "forgets"

half of the song... It just dissapears ... The measures are running ....but ther is nothing there... Went back to my savev version of the song, worked fine, and all of a sudden ... the same thing happens again

. PLease help!!!!
V. 3.0