immobiliser problem peugeot speedfighter2 50cc 2003?

i have suspisions that someone tried to steal my peugeot speedfighter 2 50cc the light hardly ever flashes for the immobilisor and if it ever does it flashes to fast then when i try to start the bike up it flashes as it would normally to tell me it has turned off but then it flashes twice then the light stays static and does not turn off until engine is turned off i have tried charging battery and have followed everything it says to do in the haynes manual which involves disconnecting negetive battery cable and un plugin arial in cdi unit but still does not work