Silly Charging Question

[yottabit]

So this may be a silly question, but I've just received the T-Mobile MDA (HTC Wizard) second-hand and without a charger.

The Mini USB port on the bottom allows ActiveSync and charging from my notebook's USB port, but when I try to charge using an AC-to-USB adapter it doesn't work... I've tried two different Motorola phone chargers and a generic one that came with my Jawbone that has a USB female connector on the adapter and you supply your own USB cable. I've used the same cable I was using when attaching to the PC, but no luck.

Interestingly enough, I did get it to charge with the same USB cable once at an airport by plugging it into the Southwest Airlines chairs with the USB power plugs...

So does anyone know? Does this phone require a special sort of charger?