When using Bluetooth, wlan will be disturbed (Thinkpad T42)

[Patrik28]

Now this is a difficult problem. I'd like to use my new Microsoft Bluetooth notebook 5000 mouse, but when I turn bluetooth on (Fn + F5 -> Bt), the wlan connection won't work properly (yes, wlan is on).

Should they (Bt & wlan) work at the same time or is the problem with faulty mouse? If I won't use internet by wlan, there are no problems. My laptop is Thinkpad T42p. I just wonder, where should I call: to Microsoft or Ibm/Lenovo.

Edit. It seems that the fault is with T42p laptop. Immediately after Bt-led is lit (so Bt is on) browser's (IE7 or Firefox) can't go to anywhere.