You could also try disconnecting the battery for a couple of minutes(negative terminal), with the keycard in the reader. This has worked for me a couple of times! General advice on here is to have the sidelights on when disconnecting/reconnecting the battery.
Just got back from holidays last night and tried the above process and it worked a treat,so I am now a very happy bunny,thanks for the help everyone.
Currently in fatbhoy67's garage: 2004 Renault Laguna 1.9