OK Mark.

Your firmwares are probably not compatible.
You need to update both the transmitter module and receiver module to version 2.33:
http://www.weatronic.com/en/download...-12-22-r-serie
http://www.weatronic.com/en/download...l-24-dual-fhss

Make sure that you format the card correctly before doing the update ( FAT 32, cluster size default ). The card shall be a recent one, max 2 GB, formatted in a good quality reader/writer. The formatting process is essential for the firmware update to occur correctly.

Also read these instructions:
http://www.weatronic.com/en/download...-24-dual-fhss-

P.S: I can see that your receiver is already running on 2.33. So just check the transmitter firmware version on Gigacontrol and update if necessary.