image flip problem
 

hi guys,
I'm using pp2 and capturing from a xl-h1 with the redrock adapter. the footage is perfect when i import it, but when i flip it there is always a thin white line of "static" at the top of the frame! its always white and it moves,(like the tracking being off on a vcr.)like i said it only appears when i flip the image. can anyone tell me whats going on? thanks