Map Maker crashes when importing terreain

[LaaGata]

Hello people!

My problem is, that I made a terrain in Photoshop CS3, saved it in the terrain folder, as a png archive (island1.png).
But when I import it in the terrain thing on the Map Maker, I click enter so it loads and FH stops. A window opens, it says "Feral Heart.exe stopped working"
no matter how hard I try it keeps happening.
Help please D=

[Nowe]

Make sure the image is in GrayScale Format and that you have flattened the layers.

[SoulRevenge]

You would have to name it 'island1Terrain.png'
Also, make sure that-


It's 512x512
GrayScale
No Apha Channel
and layers have been flattened.