Hello

I have exported a small chunk of 1:25000 OS mapping to my Adventurer 2800, but cannot get it to activate, so it shows as blocky. I have gone through the licence,SD card, activate route several times to no avail, and I have also tried re-exporting the map section several times. The strange thing is that I can export other chunks of 1:25000 OS mapping with no problem, including the adjacent area! The annoying thing is the actual chunk I want is where I have just bought a mobile home, so would really love the mapping around it!!
Any ideas?
Cheers
Nicola