New computer won't play online games

I just built a computer (my first build) and installed Call Of Duty and Battlefield 1942 on it. When I tried to play Battlefield, it kept freezing up on me. After a map would load, it'd freeze or after I had been playing for 5 minutes or so. I uninstalled and reinstalled it several more times but to no avail. I thought it must be a problem with Battlefield 1942 since Call of Duty single player worked fine. However, when I got the patch for COD and started playing online, it froze up on me. I then tried BF1942 single player and it worked fine.

Obviously something is wrong with my internet, but when I'm browsing the web or on AIM everything works fine. I'm on a LAN and the other computers on my network can play online games. Also, my ping is way higher than it used to be. It was always around 60 on my other computer, but now it's hard finding a server under 200.

Does anybody know what may be causing the problem? My motherboard has a built in firewall I think, but I don't think I installed it. I tried disabling the windows firewall, but that didn't work either. I'm using Avast antivirus and Microsoft antispyware.

Thanks for any help.

AMD Athlon 64 3200+ S939 processor
WD Caviar SATA 80GB Hard Drive
XCLIO ATX 450W PSU
Radeon ATI 9250
Chaintech VNF4/ULTRA
1024 mb Corsair pc3200 ram
Rosewill value case
Windows XP Home

 

I doubt if it's something wrong with your Internet.

It's more than likely to be driver related.

Try updating your video card and motherboard/chipset drivers, as well as DirectX.