SIXAXIS controller problem?

[TICH]

when i first brought my ps3 and press the ps button it would come on and of course being bluetooth connect with the ps3 and one red light will stay on the top of the pad.

but recently it just would not connect and the red light on my controller would just keep flashing(i've checked it for charging numerous times the display icon says it is fully charged) and i have to connect the controller via the usb then it would just stop flashing and one red light will appear like it supposed to do when turned on, and it is really starting to piss me off when i keep having to connet to the usb cable.

if anyone knows what the problem is pls could you tell me is it just faulty and in that case i need to contact sony to get a replacement. thanks a lot.