Connection Problem to many PC Game Clients

Alright so I have a 2Wire 1701 HG wireless router and then have a Wireless-G USB Adapter (model # WUSB54GR) and I'm trying to connect to the Steam, EVE, and WoW clients and they keep telling me the server can not be reached. I've tried port forwarding, I've even switched it to DMZ+ mode. From there I've also (against my better judgment) turned off my ZoneAlarm and allowed all traffic in and out.
I'm desperate for some help, any ideas?

Skal

P.S. If this thread needs to be moved to a more specific area then my apologies, this problem just only seems to be happening for video game clients.

*update*
I've run AdAware, LSPFix and have shut down all other programs that actively use the internet (such as Trillian). Still doesn't work.

 

XP and the firewall is turned off, when I get back from work I'll see what I can do about ZA and I'll update.

 

Turned ZA completely off, all the protection turned to off, program control, everything. Still doesn't work.

 

I've gone ahead and reformatted my hard drive (it seems to get easier every time) and the problem is no longer an issue. So for those curious I'm pretty sure it wasn't my router but some software that was blocking my access. What it could have been I have no idea.