Existing Movies Now Do Not Play

Just installed ATV for the first time now my existing movies do not play. All I get is a White screen.

Is there a fix for this?

what kind of existing movies.  that could mean many things

1)  ITUNES movies that will play under ITUNES and you want them on your ATV via streaming over your network.

2)  Movies that are sync between ATV and your computer running ITUNES.  These have been transfered to the ATV, and are stored on the ATV.

3)  Movies that have been copied via FTP to your ATV hard drive.

4)  Movies on a USB drive attached to your ATV.