can someone help out, can't load downloaded maps

im trying to install the newest map on my tomtom xxl with iq routes and i can't seem to get the maps to work, i've tried the easy activator and the self install maps. it came with navcore 9.510 from factory and i that didn't work, and i've installed the downloaded navcore 9.510 and and tried maps australia 915.5074 and 910.4892.
neither worked.

can someone help out, i'm guessing i'm missing something simple, but i just cant get it working.

Did you follow the instructions provided within the 915 map thread?
Did you check the tutorials?
"Don't work" is no error message I have ever seen on a TT, so please be more specific with your requests.

it comes up with "you cannot use this map on this device: Australia-817"

So you did not follow the instructions from the map thread?
If you did you would not have that error message ;)

i did i thought, as easy activator didn't put the meta on correctly. i used fast activate and it seems to be working, will test properly and confirm.

If it shows you the map it will work.