hi im having alot of trouble with my blackberry 9320, whenever i put it on charge the white battery sign with a red cross comes up, i've inserted a brand new battery its still the same, tried plugging it into the computer still same screen and same when i charge it sometimes when i charge it, it'll show the white battery with the yellow charging sign, and then onto the reboot screen but after 2 minutes it will turn off and go back to the white battery and red cross sign, i've cleaned the metal bits of battery and the phone and still no look :( help