New Dualshock 3 wont charge?

Hey forum,

I got my first Dualshock 3 this Christmas! I've been using the launch Sixaxis since I got my PS3.

Anyway, I registered it with my PS3 and plugged it in to charge, but it doesn't. The 4 red lights flash twice as if it's charging, but then cut out and stay black. The Dualshock itself does actually work (I've just been playing Red Dead) but obviously, it's battery last minutes, if that!

Any help would be greatly apriciated :)

By the way, my USB cable charges my other two Sixaxis just fine so theres can't be anything wrong with it.

Bump

C'mon guys help me out :?