Since updating my MKIV unit with version 31 my TMC function is no longer working. The graphic still lights up green but it will not deliver me any messages. I have checked that the RDS and TP functions are selected in the radio menu. If I switch off the TMC function in the Nav menu and then switch it back on it just says, searching for messages but then fails to proceed any further.

I've been trying for days now to fix this problem but am well and truly stuck.