Win XP Pro New Account User Cannot Connect Wirelessly?

Hi all,
My girlfriend has a computer that has a wireless connection (AOL) and she
has setup an account for me so that I can also use her wireless connection
from my own account.

Unfortunately I cannot access the wireless network from my account not
matter what I try? I can see the connection using 'network connections' but I
cannot get a connection.

Can anybody give me some clues asn to why I cannot get a connection?

Regards
Gerryw