Hi, unless you have made a typo in your message here, it could be because you haven't named the unl file same as the map file gMApsup2.img + gAMpsup2.unl (capital letters done by me to highlight).

Don't know if it's just a typo in the post - if it's like this on your device, for sure it won't work. It needs to be exactly the same name.

Good luck and best regards!