It wont let me save my heightmap

[Wolf-Freak]

Ive made many maps before, without a hitch. Now ive been working REALLY hard on a new Warrior one. I finally finished my heightmap and put it in the map folder, saving it as a .png its 513x513. I went into FeralHeart and onto the map maker. When I went to World and typed in the name of my map it said 'Cannot find Warriors_Map.png!' I tried to check the spelling, then I restarted the game several times. I even re-did the heightmap. But no matter what I do it says it cant find it. But its right there in the folder. What do I do? Am I doing something wrong?  

[MayLy]

Try putting the height map in terrains>default.

[Wolf-Freak]

Thanx!!!

[MayLy]

You're welcome :3