Bluetooth Notebook Presenter Mouse 8000 - Intellimouse Drops on Hibernate

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I have a Vaio SZ running Vista Business with built-in Bluetooth. Bought a
Microsoft Notebook Presenter Mouse 8000. Connected with the notebook's
Bluetooth connection (do not use USB dongle) and it works just fine, but
whenever I hibernate the notebook and then bring it out of hibernation, I
get a Vista error message saying "intellimouse has shut down, do you want to
restart, or do you want to search the internet for a solution and then
restart?"

Anyone know why this is happening, and, if there's a fix?

TIA