Macbook airport connection drops and locks my computer

So... I think my problem tops them all. Ive done alot of searching and ive found no topic relative to mine.
- My intel macbook has an airport extreme that can succesfully connect to my schools network or my girlfriends network or my network at home. However...
Many times a day... as soon as i make my connection active by going on a web browser.
My Airport drops connection and locks my computer... only the mouse is avaliable, but
anything else i try to click.. i end up with the spinning beach ball. Only solution i can find
thus far is to force shutdown my computer and restart... Now i cant do a PRAM reset or
start up in safe mode. I dont know how to solve this...
Can anyone help me with this? It is incredibly annoying as i have to force shutdown my computer over 6 times a day which is... bad ... for my computer. More bad clusters.
Thanks much ... G

My problem is a variation on yours.
I don't lose the airport connection at all. I can connect to my Airport Extreme base station and surf the Internet without a any hassle. I can see the other computers connected to said AEBS. Network drives are mountable.
HOWEVER, as soon as I start to transfer a file or folder from or to a mounted network drive, the transfer hangs. The only solution is to power-off Airport to get the Mac to acknowledge losing connection to the network drive. Otherwise I would continue to stare enlessly at a frozen progress bar.
Hopefully 10.5.2 will address the issue.

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