As Razorblatter said, FA reports your map as incomplete so make sure that your map folder on the SD card is named something like this:
United_Kingdom_and_Republic_of_Ireland_960_7075
You can call it anything you like but it must contain no spaces or special characters and the complete map must reside within that folder.
Once you're happy with that, download FastActivate from
[Please Register or Login to download file] and extract it to the root of your device
Then navigate to the root of your device and run FastActivate.exe and choose options 2 then 3
At this point you should be done but if you're getting the same error, then it would appear the map you downloaded is incomplete which would be very unusual.
If that's the case, download the same map again from another one of our uploaders
[Please Register or Login to download file] and try again following the same process: extract map to device>run FastActivate again choosing options 2 then 3