According to some paperwork i had with one of my camera's the slow flashing light means low charge (not enough power getting to the camera to charge it). You try another usb cable.
It was published on that website all about this camera (forgot the address now, its on one of the first pages) that the USB cables supplied with these cameras are totally crap and they cannot even be used for anything else i.e. digital cameras as they are very poorly made - the only solution as mentioned is to source a better USB cable.
Liam