Custom Minimap Preview

Well I have downloaded WE unlimited and it says you can use it to get custom minimap previews. I wanted one for my map so I tried how it seemed to be done. I opened up WE unlimited and the main menu came up, I went on edit map, then to imported files. There is the box to import a minimap, so I made my minimap and imported it without any problems. I saved my map.

However when I go to play my map the defult preview is still there, I've had a look around to see if there is anything obvious I missed but I can't see it. Sorry if this has been asked before, but I couldn't find any topic on this subject.

It should work the way you described it.
Please look in the import manager if war3mapPreview.blp or war3mapPreview.tga is in the imported files list.

Well I just went through and checked it all, and it seems as if it should be fine. I've fiddled about and tried different combinations, different picture sizes etc. I also tried putting in an ingame minimap which DID work, but that's not what I want. I did try adding a custom preview to different map, but that did work either. I've added a little screeny of both the import things so you can correct me if there is any mistake in the destination/name.

Looks ok everything, which leads me to think the blp might have been converted wrong and might be corrupted.
Are you able to extract the blp from the map and watch it with a blp-viewer?

Well I don't know what the problem was, but what I did I exported it then opened it with war3viewer (which i downloaded as soon as I read your post) then I converted into TGA and imported that instead and now it works. Strange and a little long winded but I don't care, it works now. Thankyou.