dont know if anybody can help

The outlander 2004 suddenly stopped taking commands from its fob
Decided that the cobra mobiliser 8165 was faulty as soon as the pin code from cobra would not take .

So got my electrician to remove from car and now after removing the alarm unit found it still would not start ,
Electrician found a 5020 separate immobiliser and has removed still would not start ,now turns over but saying its immobilised off

so changed the esu along with key unit complete and fuse box unit from a working car still says mobilised out

any help would be helpful as disabled and need the car
peter