Netgear MA101 keeps switching back to Ad-Hoc

Hi:

Thanx to all the experts who posted in this forum, I solved (or
thought I did) the problem of connectivity between my Netgear MA101
USB Wireless adapter and my Netgear MA814 Wireless router, by
disabling the Wireless Zero service. Now, I'm having a different
problem. The MA101 keeps switching back to Ad-Hoc mode. For example,
yesterday morning, I set it to Infrastructure mode and typed in the
passphrase. It immediately started talking to the MA814 and internet
connectivity was established on that PC. But, today afternoon, when I
tried to work on that PC, I found that it was no longer connected to
the internet. When I investigated further, I found that the mode had
switched to Ad-Hoc, and so its not able to communicate with the
router. This was the 3rd time it happened in the last week. I would
sincerely appreciate it if somebody on this forum could give me some
tips/pointers/hints/advice to resolve this issue.

Thank you.

Swaroop