Windows Messenger 4.7 No outgoing video...almost there!!!

I recently built my girlfriend a pc and tested out Windows Messenger
(4.7) and it worked great (of course, it was tested on my home
network). To my surprise, it didn't work once we hooked it up at her
house.

This is where I'm at now:
Girlfriend's PC (p4 2.66ghz, 512mb, etc.)
Connection: 56K Modem with a dial-up accelerator installed
Windows XP Pro
Windows Messenger 4.7.xxx
Vibra (creative) usb webcam, microphone, etc.

My Computer, p4, etc.
Connection: Broadband, SMC 2404WBR gateway/router (with UPnP firmware
upgrade)
Windows XP Home
Windows Messenger 4.7.xxx
IBM webcam, microphone, etc.

I've enabled UPnP, Firewall with DMZ, as well as enabled some opened
ports (I really don't know how to do this part), and the results are
99% okay.

IM works 100%
Voice communications work 100%
Video conference works 50% (I can see her, she can't see me)

Her video feed is okay on her end and is received on my pc. My webcam
feed seems to be faulty. Should I reinstall WM4.7 and recalibrate my
webcam? I can't seem to find any FAQ's on my situation (where one
feed works, but the other doesn't).

Thanxs for any advice any one can leave me.
george