Also check all fuses espessially 2nd and 3rd fuse down on right hand side of fuse box near driver door, i sometimes have to take out second fuse down and put back in has my start button does same has yours.
Currently in blaster's garage: 2004 renault lagunaII 1.9dci dynameque
Well I tried the suggestion of holding down the start button and putting the card in but it had no effect. I have also checked all the fuses and they are fine. Scratching my head on this one so if there are any more ideas I am willing to give it a go.
Currently in Elmer's garage: 2002 Laguna 1.9dci 120bhp