Win vista network problem

Hi
I recently installed win vista ultimate to my laptop. the problem is, i can not access internet through wifi. i insert the wifi password and it connects but i don't have any internet access. in the network icon it only says " Local network" but when i disabled the wifi password security it works pefectly.


by the way I have 2 other laptops with win7 and they are working pefectly with this network.

Can you check the TCP/IP Properties by going into the below settings:
Start, Connect To, Connection, Properties, Scroll Down TCP/IP and highlight, click Properties and check that Obtain DNS and IP address automatically are enabled.