Seems a little strange that you've got two different wireless device drivers on the computer...but if there are two separate devices for your wireless "Network Adapter" in Device Manager, try opening the properties on the Windows wireless driver, then disable it at the bottom of the screen.. That should allow the other wireless drive to have control.
Hope this helps.
On my Dell Inspiron 6400, Win XP laptop, I have Intel PRO/Set Wireless managing my wireless connection. However, windows wireless driver also tries to manage the wireless connection from time to time thus knocking the wirless connection down. The only solution so far has been to restart my computer. But I have to do this 4-5 times in a matter of half an hour. Each time it boots back, the wireless connection works with Intel PRO/Set and then it stops working and gives me an error "Cannot connect to Profile."