JUST bought Halo 3, go to play online with my buddies, and all of a sudden i cant play online due to NAT compatibility issues....wtf?

I have been playing GoW, Vegas, Halo 2 and other games online FINE since mid febuary when i bought the system.

Ive got a headache now from tying to solve this problem...anyone? help? please?

Ive got a NetGear WGR614 v5 router

and it says it shoudl work with XBL here: http://kbserver.netgear.com/kb_web_files/N100981.asp

ANY HELP IS MUCH APP. THANKS.

Hey, quick question:

I recently bought a 22 inch BenQ LCD computer monitor which I play my Xbox360 on, now I was wondering if there was any way that I could hook up my old PS2 to the monitor, is there a PS@ DMI cable floating around out there that I havnt seen yet?

Or is the PS2 too fossilized to support such technology?

Thanks to any who respond.