Vista - Vista & WPA PSK

Hi,

My daughter has a new laptop with MS Vista. At first I was able to get her
connected to our home wireless network (WPA/WPA2 with WPA-PSK, AES) but now
it does not work. The network properties security tab shows there is an
8-character network security key. Our network security key is 12 characters.
I type in the correct key, but it does not stay. Upon reopening the
wireless network properties/security tab, the key has reverted back to the 8
character key (which I can't see--dotted out).

Any help with this would be much appreciated!