iTunes video downloads won't work?

[chaosunknown]

My movie downloads won't download wirelessly over my wi-fi connection. It just shows "download error. tap to try again". I tap on the movie and it shows it's prossecing the information then it fails and shows that download error again and it will do that with every single movie in my list. Can anyone help me out so I can watch the movies I rented on iTunes on my iPhone 3G which has 3.0 OS on it.

 

[synergy]

You're trying to get them from iTunes to your iPhone? Or are you trying to download them via iTunes on the phone?