Wireless network authentication keeps changing

I have a wireless home network running on an Apple Airport Extreme base station.  It works fine but has to employ open network authentication with WEP data encryption in order to be compatible with an old laptop I have.

The issue I have is with my work laptop.  It has been working fine on the network, but recently has decided to keep changing the network authentication to WPA-PSK with TKIP data encryption.  I go in and manually change it back and that works fine for a few minutes, but then without warning it changes back and I again lose the wireless connection.

The strange thing is that it remembers my settings in the "Preferred networks" settings, it is just the "Available networks" settings that keeps changing.

Anyone out there got any thoughts?
leesloanAsked:
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slam69Connect With a Mentor Commented:
Have you tried deleting the connection and recreating it from new. whilst youll have to put teh key back in it could just kickstart the maintaining of the settings.

if not then it will be an update that has been recieved. check your event logs for any updates thatoccurred over the weekend.
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kadadi_vIT AdminCommented:
More info :- http://docs.info.apple.com/article.html?artnum=106858

Check is there any settings related  mac address aunthetication and configure your mac address of laptop to apple airport and also chek that prshared password key is changed every 60sec ( for ex)settings and upgrade your wireless card driver software.



Regards,

Vijay Kadadi
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leesloanAuthor Commented:
hi kadadi_v

i don't think the issue is with the airport base station since this seems to work ok with other computers on the network.

unfortunately the affected laptop is my one from work which is locked down, so i can't update the drivers.  but it's strange that it was working until this weekend and now seems to keep changing.

please can you give me directions to check the mac address authentication and the prshared password key settings?

thanks.
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leesloanAuthor Commented:
I thought I'd done this already, but I tried it again and it seems to have done the trick.

thanks very much.
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