MN-500 wireless gaming problems

I bought this MS wireless network a month ago and can not
get it to run online games like my wired network.

The components are MN-500 base stattion and MN-510 USB
adapter. The game I play is Unreal Tournament. As far
as internet surfing I am fine. The problem is while
playing Unreal I experience intermittant brief "pauses"
or lapses in game play. I check my ping and packet loss
during these times and they both shoot up. After a
second or so everything is back to normal.

I have tried MS support via phone. Not much help. I
tried changing the channel number, nothing. I tried
change the data rate all the way down to 1mb/sec,
Nothing.

I really need this thing to work for me. Is anyone out
there that has solved this problem? Is it solvable?