Vista x64 wireless weirdness

Hello, I have an Alienware M17 with Vista X64. I have a seemingly random hang up with my wireless N when playing world of warcraft. I get kicked off and lose all connectivity (the connection says local only). It seems to happen more when i have other computers connected to the network via wireless. I have two more laptops one with N one with G. My router a shiny black linksys (forgot the model number) says it has the capability to do N and G simultaneously. The only way I have been able to resolve the issue when it happens is to reboot. I'm new to vista but have been using PC's since 1991. My free time is alot more narrow than it once was so I haven't had time to try to figure it out on my own. Any help would be appreciated. Oh and vista wanted me to do some kind of special wireless setup but i couldn't get that to work so i fiddled till i found the regular way, don't know if that might have something to do with it...

Lando