wireless connection problem (tos a200 1ah)

hi
i have a Toshiba A200 1AH notebook with windows vista. i try to connect to usr9110 wireless modem but i have not succeeded yet. i changed all settings my notebook and my modem. i set wpa security, when i set wep problem is solved. but i know that wpa is safer than wep. and i want to use wpa. other computers in my home is connecting well. i tried this things;
-reinstall windows vista
-update bios
-update drivers
-update modem firmware

but nothing i have. wireless card is ''intel wireless wifi link 4965agn''. please help me.thanks.

 

does it connecct to the the network but you get no internet? look in network and sharing center.. you see a link to the router but no link to the internet. if so you have the famous vista local only access no dhcp problem and are in big trouble. if not you are doing something silly...

 

everytimes i see the list of connectable links. when i click mine, i am getting this message ''unable to connect''. no internet and not connect to the network.
as i say, if the connection in secure (wpa) i can't connect. connection in secure (wep) or not in secure i can connect. i didn't do anything silly. do u have any idea? how a trouble i am in? what can i do?

and one thing more, i installed windows xp a few days ago. i use double os now. and i have no problem with windows xp, everthing works well. but windows vista makes me angry. please help.

 

ask a friend to come round and help you! vista is horrible but i am not sure we can blame it for this one