Well, we never learned what the OP did about his issue, fixed it, new board, different board, etc.

In my experience, Network chips or cards either work great from the start, or don't, or are flaky and never get better. Perhaps ASR received a bad run of the BroadCom network chips, or something else in its circuit is bad. I do know you must install the Broadcom driver or it won't function at all, Windows 7 does not have a driver for it.

I would return the board, or get a cheap network card, for a test or replacement.