wiimote stops working

[Scorpwanna]

Hi, I have successfully paired a wiimote with Dolphin, it works great in game, New Super Mario Bros. But a few mins playing on a level the lights on the wiimote just go off and it wont come back on. If I leave it paired up to Dolphin and do not select a game it seems to stay lit up longer with the first player light. But yet again, if I enter a game, play for a few mins the wiimote just dies.

Thanks.

Bluetooth adapter used Belkin F8T001
Os: Windows 7 Home Premium
Bluetooth stack: Whatever comes with windows.