modem reset problem

[GuyOnTheCouch]

Hey all, let me start with im glad to be back in the [H]ard|Forums, havent visited in a while...

Anyways, for a while now, everytime i play Unreal Tournament 2004, about 20-40 minutes in, while on any server, my cable modem resets itself...
Cable Modem: Com 21 DOXport

any ideas?
ty in advance