Video Messageing

Alright, so my gf has PC and when I go on iChat to try and talk to her over AIM it doesn't work. I believe I have the latest iChat installed and I even tried skype and other programs, but nothing will work.

Any ideas?

Edit: I have a macbook pro.

No thoughts with given information. Does iChat give you any sort of error message? Anything to go off of at all?

Forget AIM use Skype. It supports both platforms with sound and video.