Can't connect a type of BT mouse

[xxPaulCPxx]

This is on my dad's T42 with the Radeon 9600, BT was included.

Here is the history:
He has used a pair of bluetooth mice, one at home and the other at an office, both are the Model 1001 MS Intellimouse Explorer for Bluetooth. Both worked fine until a few days ago, now neither of them work.

Since I had my new Kensington bluetooth mouse, I tried connecting it - it works flawlessly. The MS mouse works flawlessly on my laptop. I cannot get it to connect on his laptop.

Any ideas on reviving his mice?

[xxPaulCPxx]

Other info...

In the tray, the BT icon is red an says no devices found. My Kensington is connected an working however.

When I add my Kensington to his laptop, I get the HID driver installation dialogue. I get nothing after I connect to the MS mouse on his laptop.

After I try adding the device to BT devices, it will appear until I close the window. When I reopen it, it's gone.

After adding the MS mouse, I see it in the list. I go into properties, and only the General and Services tabs are shown. When I hit the services tab, it searches for a moment before it comes up with the HID drivers, and the box is not checked. When I check the box, I get the message "Bluetooth Service Error - Access Denied"