[Soala]

Did you put the gmap name in the server options ?
Also what is your map called ?

I knew some people directly naming their map in the levelgenerator with like .gmap in the end, the map was totally destroyed.

Well here's how I do to make a map works in less than 30s !
I create the pic, use level generator, name my map with like mymap_
Then when the map is generated, I upload it all, INCLUDING the .gmap file in levels on file browser, update the name in the server options WITHOUT .gmap extension in the name, then with RC
I just do /updatelevel mymap.gmap
Then I can warp on it without any problems.