Mms/gprs profile oroblem

Hello,
i have nokia 6300 phone.i installed setting before and afterwards i remove them by deleting the setting. then i reset the phone to factory defaults.But now i tried to install gprs setting to the same phone but it says"only 70 sets allowed.Discard setting"? When i tried to i tried to install manually it says"cannot add new account.Memory full."But phone have 4.3MB free memory.Please help me regarding this matter...