Wireless authentication failed because of a timeout.

Hello,

I'm getting a "wireless authentication failed because of a timeout" error message when I'm trying to connect to a wireless network using WPA-PSK and TKIP. I have a US Robotics modem, and my wireless driver (Intel) is up to date.

I have no problem connecting to the same network while using WEP or no security. I can also connect to another network using WPA2 and AES. I'm running Windows Vista with SP2.

Any advice much appreciated.