repeated request for wireless password, no wireless connection

view full story

http://askubuntu.com – whenever i try to connect to a wireless network, ubuntu (11.10) asks for the password. when i enter this it thinks for a couple of minutes, then asks for the password again. This happens repeatedly. (it isn't a problem with the wireless modem itself, as i can connect to wireless from the windows 7 opererating system i have running along side ubuntu. If anyone has any ideas about how to fix this they would be much appreciated! Thanks (HowTos)