whelp. its are you sure its a cross over cable first off? if it wont connect for more then two seconds I suggest you make another one (I assume you made it) or make sure no fans, motors, etc are arround to disrupt the connection. Its much easier to just connect two straight throuhgs through a router, but thats a more expensive proceadure I know.
If you still cant get it to work I suggest you visit the xbox-scene.com forums .
-hope this helps.
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