Yes, the LED on the dash is costantly on, and my key fob is not working (I have changed the battery, but it seems the sensor in the car is not working)...
Try disconecting the battery for a few mins, it might reset the immobiliser so you can then disarm it. The later Meta immobilisers have a key so you can override it if it doesnt dissarm when unlocked, guess the gemini doesnt have one?.