have u updated your tomtom recently? if so u would have been given the option to do a back up of the tomtom SD card, simply reload the software back on the the card, failing that u can contact tomtom customer services on 0845 161 0009 and they can walk through it over the phone, and if it is still in warranty they should repair it. if they cant fix it over the phone.
Lee Newton
October 2007
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