Radio code prob Clio 1.5 DCI (03)

Recently had probs with immobiliser kicking in (due to bump starting car we think). Advised to disconnect battery and connect again after an hour. This worked fine - car now starting, etc. However since connecting battery again the radio code (which we have) is not working when entered. We know that it is the right code as we have previously had the battery disconnected a while ago and it came with all the paperwork with the car.
Why is not working now?????!!!!!!! Anyone any ideas/clues.
Thanks

Code problem fixed - error on our part. Entered code but failed to press the right key to get it to work, now resolved.