*FIXED*Height Map Problems. I need help!*FIXED*

[DragonEye]

Yellow :3
I need some help! I started on a new map yesterday and when I was 'coloring' the map with many shades of gray and was going to test it in Map maker it just crashed on me.
Before I was done 'coloring' it with mountains and valleys and it was just on big flat land I tried it in the Map maker and adjusted the width and height and ocean height and it worked fine.
But when I almost was done shading it and open it in FH Map Maker it just crashed on me again!
I have had this problem before with another beautiful map I made and I got so angry that I gave up and haven't touched the map maker since.
I'm using Photoshop CS6 to make the map and the map is in 513 pix x 513 pix in gray scale.

This is making me crazy at the moment and I want to make maps again!!
Soo pleeeeeaasss someone help me!

***The Problem is solve***

~DragonEye~

[SilverTW]

Did you remove the Alpha Mask? If not then you need to remove that mask and also make sure that it is saved as a .PNG

[DragonEye]

The Alpha Mask? What's that? Never heard about it
And yes, I have saved it as .PNG file.

[Kerriki]

Are you sure it's only one layer? FeralHeart can be very picky and only accepts one layer.

[DragonEye]

Yes, it is just one layer.

[SilverTW]

The Alpha Mask? What's that? Never heard about it
And yes, I have saved it as .PNG file.

It's a color mask I think. You want to delete it. You can right click the layer and it should say delete Alpha Mask, if not, then you might want to use GIMp then right click the layer and click Remove Alpha Mask.

[DragonEye]

The Alpha Mask? What's that? Never heard about it
And yes, I have saved it as .PNG file.

It's a color mask I think. You want to delete it. You can right click the layer and it should say delete Alpha Mask, if not, then you might want to use GIMp then right click the layer and click Remove Alpha Mask.

It was nothing about a Alpha mask there. BUT You gave me kinda a answer
At first I had made my Original Layer called 'Background' to a regular layer, or my Photoshop did it. So THAT'S why it didn't work in Map Maker. I had to right click and 'Flatten Image' to make it the original Background layer again and now it works fine Yaay
Thank you SilverTW to lead me to this discovery