I'm slowly losing my rag on this one.  I bought Gears of War (PC) and I can't get it to connect to the gamer profile I've created online in G4WL.  I've had a lot of the 0x80151909 "Cannot connect" error but I can't see what needs to be done to correct this (forget about the official troubleshooting sites). 

Attached below is a shot from the GoW Network Information screen.  To me, it looks like the connection's being blocked as the Internet IP Address is being displayed.  I've tried turning off my Windows Firewall (no luck there) and I've seen on the interweb that sometimes adding port forwarding helps but I can't work out how to do that.

I'm running Vista Home Premium, using a D-Link DSL-502T (firmware V3.00B01T01.TX.20060517) on Xtra.  Can anyone help me here?