Linksys Wireless Router :: Weird WRT54G2 Errors False Disconnects

I am directly plugged into the router on my computer, and it is used wireless for the rest of the computers in the house.  Frequently (3-4 times a day usually, sometimes more like every 20 mins, other days not at all), the router and Network Magic will tell me my computer has lost internet connection, and browsers and any program I try to start won't be able to connect to the internet.  However, I know the connection is still live because any program that was running and accessing the internet beforehand (multi player games and instant messaging programs, for example) still run fine with their connection and I can continue to play or chat online until I close that program.  
 
Trying the 'Repair Connection' on network magic doesn't work, but unplugging and replugging the power cable to the router fixes the issue(again, so I know it's the router and not the internet)whatever reason the router is deciding to tell me it's not active and refuse access to the internet for new programs when existing connections don't show any problems.