Problem with my Bluetooth Mouse or Bluetooth hardware

Hi there, Im running an XPS M1730, with Vista, patched up to the latest patches.
Anyway, I also use a Microsoft Bluetooth NoteBook Mouse 5000, and every so often it becomes unresponsive for about 20 seconds and then comes back online. This seemed to happen soon after an auto update, I dont recall exactly when.
Anyway, in teh event viewer, the following warning appears when the mouse goes offline:
Log Name:      System
Source:        HidBth
Date:          05/03/2008 15:57:31
Event ID:      2
Task Category: None
Level:         Warning
Keywords:      Classic
User:          N/A
Computer:      SOCLTD1
Description:
Bluetooth HID device (00:12:5a:69:b5:11) either went out of range or became unresponsive.
Event Xml:

 
   
    2
    3
    0
    0x80000000000000
   
    45341
    System
    SOCLTD1
   
 
 
    \Device\_HID00000001
    (00:12:5a:69:b5:11)
    00000000020028000000000002000180000000000000000000000000000000000000000000000000
 



Can anyone please help me? This is driving me nuts!!

Many thanks
Shane