HELP!! Beginner

I'm using Pioneer CDJ 800MK2 and the marks are off when trying to beat juggle. What could be the problem? Is it better to be in a certain mode? (absolute, relative, hybrid)
Also, my bpm in the MixVibe Cross are the same but the beats do not match. My pitch is set to (0) on the cdj turntables. ?????
Also, I'm experiencing audio dropout. This occurs sometimes within the mix and when I'm loading a song in one of the decks? How can I prevent this?
Does MixVibe Cross work better in Vista or Windows 7. I currently use Vista.
HELP!!!!
Also, my bpm in the MixVibe Cross are the same but the beats do not match. My pitch is set to (0) on the cdj turntables. ?????
Also, I'm experiencing audio dropout. This occurs sometimes within the mix and when I'm loading a song in one of the decks? How can I prevent this?
Does MixVibe Cross work better in Vista or Windows 7. I currently use Vista.
HELP!!!!