I have had no problems for a year, and this morning I got in the car and entered the code and nothing happened?

Tried a couple of times, then left it for a for a while and tried again but still the LED doesnt flash to confirm code entered ok.

Any ideas??

 

Panic over. Disconnected battery and all ok now.
Still don't know why it hapenned though?

 

Something is wrong, it wouldnt take the code again today and i had to reset it by disconnecting the battery again
Anyone shed any light as to the problem?