Just got a new TomTom 510, which comes with a 256mb memory card. I want to back this up and put the detail onto a 512mb card - to allow for extra voices, maps, etc (the 256mb card only has a few mb's free) Now here is what I have done so far; 1. put original memory card in the unit and "created a backup" to the PC 2. took out the original memory card and put a new 512mb card into the unit 3. then I "restored" the data from the PC to the new memory card However, when I then switch the unit back on, it comes up with a message saying; "this product has not yet been activated" However, I have already activated it and if I try again, it comes up with an error code which says; "not the correct code for this product" Any ideas?? Can I actually use a bigger memory card than was supplied? There are no hidden system files, so everything should be copying over okay The card seems to copy over, but when I put it into the unit, it says not activated, yet when I put the activation code in, it tells me it is wrong - but it is not Yet when I put the original card in, no activation code is required Any ideas please, cause I have just spent around 3 hours trying to do this and it is driving me nuts!!!!!!!!!