Dewalt charger problem

Hi,

Please could you kindly help me,

I've just bought a new nano technology Dewalt hammer drill 18v

Thedrill and batteries work perfectly, but when I came to charge thebatteries for the first time. The red light came on for a few minutesand then disappeared. Now it doesn't work at all, no red light and nocharged battery.

Could someone please advice me as what to do?

I've checked the fuse in the transformer and it seem fine. (very thin single wire attached both ends)

Is there an additional fuse I should check, perhaps in the charger it's self?

Hope someone can help :)

Cheers
Jon