bluetooth and camera not working in Nokia 6600?

Some days back bluetooth in my Nokia 6600 stopped working. whenever i started it the message the mobile would give is "system error". and after restarting the mobile several times my bluetooth would start again. some days after that my camera suddenly stopped working. whenever i started camera error message came "temporary overload... and i was not able to take pictures. i formatted my memory card, i also formatted by phone memory by various methods but in vain. my bluetooth and camera didnt start. what is the problem with my mobile phone. Please suggest who to solve this problem.Any help would be appreciated. thanks.