WRT 160N Games loosing network connections

When I am playing MW2 and Socom Confrontation (on PS3) or any game I get a message, and go to the main screen saying No internet connection deteced you must have a active network connection to play this game.  I not only get this from online gameplay, but even if I leave myself signed in I lose the internet and the same message occurs.  I checked with my laptop EasyLink Adviser map and the whole network goes down.  It's not the PS3 because I had it serveced for a diffrent issue with video, but this is ridiculous.  I paid 75 dollars for this router and im pretty mad with Linksys because the same thing happened with my G Linksys router.  ....More Info  My network provider is BrightHouse but this also happenes with Knology.  The WRT 160N v.3 is wireless what's wrong? Someone please help ME!!!  I'm going to throw the router through a window then pick it up and go to another WINDOW!!

When the internet goes down on your PS3, at that moment you can check if you are still able to go online from your Laptop or not?
On your Router setup page change the MTU size to 1365 and click on save Settings and then click on the Wireless tab and below change the Wireless Channel to 11 and then click on the "Advance Wireless Settings" and below Change the Beacon Interval to 50 ...Change the Fragmentation Threshold to 2304, Change the RTS Threshold to 2304 ...Click on "Save Settings"...

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