Check door locks and spanner on the dash how to fix and remove?

Hi I have an 08 Megane diamonique 1.5 there suddenly came a message on the dash ' check door locks' and the spanner symbol came on. Checked all the doors all working and locking fine the only thing different was the red light on the childlock switch had gone off and when it is switched on it now clicks an extra couple of times.
Can anyone tell me what's wrong with it and how to fix and remove the message. Here's hoping.