T43, Wireless doesn't work when running off battery

[dww777]

Hi,
I discovered that my T43's wireless network doesn't load up correctly when I start my laptop using only the battery.

My laptop model is 2668-73U, with a Intel 2915ABG wireless adpter.

If the computer starts up with the power plugged in, then the wireless device will start up fine. However, if the computer boots up with only the battery (ie. the power plug isn't plugged in), then the wireless device in Device Manager will have an error saying, "This device cannot start. (Code 10)."

Plugging the power in or out after windows has started already has no effect on the wireless device.

Do you know what's happening?

Thanks!

David