speedfight 2 immobiliser problem >?? ?

hi could anybody help me>?? the immobiliser on my speedfight 2 50cc ac is playing up sometimes it works sometimes it doesnt and i was wondering if i could get around the problem by just changing the ignition block.

atm i onli have the RED key and i heard that the red key is onli used for programming immobiliser thats the only key i got with the scooter is the cdi messed up now or can i jsut by a new ignition with red and black key and re programm the immbiliser in the cdi.

please reply asap

many thanks...