T61 wireless stability

Recently my employer upgraded my notebook from a T41 to a T61 machine. Both had wireless capability. At home I have a wireless network using an Apple Extreme router ("n" capable) using encryption WPA2-PSK. The old notebook worked perfectly as well as all of the other systems in the house.
The T61 using WiFi card 4965AG seems to have problems connecting to this network. It uses the IBM ThinkVantage system for finding the WLAN.
The program shows the router with near 100% signal strength and goes through the authentication and association steps with no problem. But when it tries to obtain an IP address the system times out. Every 1 out of 10 tries it may connect. If I connect the machine to the wired system everything works perfectly. The IT department insist that it is my router, but I do not believe it since the old machine worked great with the same parameters.
Any suggestions or similar problems.

 

i'm not that familiar w/ the Apple extreme, except that it is an excellent router.

Of course you have it set to broadcast on g/n...

You may have to clone your IP

what other settings do you have on the router and how do you have the laptop card setup?

if you don't get enough responses here today, try posting later on in the Networking/Wireless Forum.........