I've turned on my immobilizer and can't turn it off. Help!!

I've got a 2005 TD5 Defender Hardtop. Its the basic model with no central locking or owt.

I've just bought a Nanocom and was playing around with it today, trying to set up my alarm with two 3TXA plippers I bought off ebay.

Unfortunately, I clicked the "activate immobiliser" button by mistake and I can't turn it off now. I can't get the plippers to work either. My pride and joy is now stranded on the driveway.

Does anyone have any ideas how I can get out of this situation? Any help would be much appreciated.

read the instructions

hit it wiv a hammer
a hammer will solve most problems on a landrover

the beauty of simplicity!! if in doubt give it a whack!!