Constantly connecting/disconnecting

Hi guys,

I recently had some problems with my networking card in my desktop. The connection was always very low, and the problem was remedied by moving the computer itself so that the antennae pointed away from the wall.

Now...sometimes I'm unable to finish even a game of warcraft because it sometime sjust disconnects. It does come back shortly after though.

Is there any explanation for this constant disconnecting and connecting?

Thanks

Andy