Try connecting it to a powered USB hub and see what happens. Most internal PCI USB cards also give enough juice to their USB ports. Of course, you should also first try it with all available USB ports on your computer - try the ones at the back first; they usually are fully powered.
i will try the hub thing.... and all i have is that card.. in the back.. none up front.. i tried all of the rear ones..
EDIT*
It charges my psp through the back its usb 2.0.... why wouldnt it charge this?
I also have a surround sound system for my entertainment area.. and it has a usb port.. and it will connect to that... and charge off of that..