HHHEEELLLPPP LRP brushless problems!!!

[j pearce]

hi, i have the LRP sphere 2007 edition with an LER vector x11 7.5 motor. For a very long time this has been out of action because it seems to glitch VERY badly. I have replaced the sensor cable, tried different transmitters and crystals, batteries and still no luck. half the time, when the motor is in one position yellow and red lights flash at the same time and the motor dowsnt move, then i move the shaft in the motor and it spins but even on a trim acceleration, it will seem to speed up and slow down violently, with LOTS of random flashing lights. Sometimes it will randomly get locked on full power and other times the brakes dont do anything. As far as i'm aware, i have done nothing wrong because i havent pluged it in wrong or anything like that...My mate from the club has tested my motor and said he can't see anything wrong with it so what do i do???

cheers