Yeah i would get a new charger. Maybe your charger is only for nicads and can only charge up to a certain amount....
If your charger is able to manually adjust the delta peak cut off then raise the cut off to maybe 10mv or 15mv. If your 3000mah battery is a cheap one, maybe set it to 20mv..
If all else fails. Go for a nice new flash charger that has all the bells and whistles :P