SupCom FA problem online when playing with 6 or more people.

Hi, I recently got both Supcom and FA and when I try to play an online match that has 6 or more people I get extreme ping spikes up to 2000ms every second or so. This makes the game virtually unplayable for me and everyone else in game. I do not have an antivirus and my firewall is turned off. All of my other games, including other p2p games run flawlessly. I am using wireless internet, and windows 7. Ive read online that there have been some problems with Windows 7 in online games. I tried the fix but it didn't help. I contacted my ISP and they gave me a brand new modem, but it still didn't help. When I play 1v1 or 2v2 the game runs fine, and when im in the pre-game lobby my ping doesn't spike at all, but when the game starts it immediately starts going nuts. I opened the ports required for this game, still no luck. If anyone could give me some assistance it would be much appreciated.
PC specs:
AMD 945 x4 @ 3.0ghz
ATI 5770 1 gig
2 gig ddr2 ram
windows 7
ISP: Cablevison, optimum online.
btw, the game runs excellent its just ping problems.|||This is probably because of insufficient upload bandwidth. Make a speedtest and post the results here!|||Or go to the sister site pingtest.net to check your ping and connection integrity.|||


my download speeds can vary, but upload is always pretty much the same.||||||That packet loss may be a problem. Any amount of packet loss is bad, especially for online gaming.|||Would 1% percent packet lose cause a game to ping-spike to a ridiculous level every second? Don't all wireless networks experience some sort of packet lose ?|||The ping spikes can also be caused by firewalls, antivirus, routers and other networking or network interfering software/hardware.|||Have yopu got all ports forwarded if behind router, port linked to fa on the firewall?,
and is your router MDZed to your pc|||Doesnt DMZing your router make it so all ports are open?|||ya to a single ip address|||how do i go about doing that? I'm using a linksys wireless router.|||ok instead of me telling you you can go to www.portforward.com that will tell you in good detail.|||coveryfire|||thanks for the info X-Cubed. May i ask what kind of speeds you are getting with cablevision? My internet performance can vary quite a bit.|||coveryfire: what applications are you running in the background? Do you use any firewall, antivirus or any other network interfering software?|||@Spooky:
As i said in my original post, I do not use anti-virus and my firewall is disabled. The only other programs I run are steam, daemon tools, and playertrack (a mod)|||Generally during the afternoon I get about 10 Mbps download and 2 Mbps upload, similar to you.|||coveryfire|||the firewall that came with windows|||coveryfire|||After doing some research I believe I need a new router. The new Wireless-N looks like a decent upgrade.