Sky cube problem

[Enduroger]

I have tried to make some sky cubes, but i cant get them look good. Its got a edge in the horizon. Look at the pic here and you will see.

I use Terragen to render the sky, then i import the pics into Paint Shop Pro 7 before bundle them with Make Cub.
I have tried different settings in Terragen and i cant see no edge on the pics before i bundle them with make cub, but when i get the sky into my track it looks like this.

[Fixer]

Back up your "cube" ini file and replace the text contained within with this:

[General]
TotalPalettes=1
TotalCubes=1

[Palette_1]
TotalFileSets=1
FileSet_1=f00?0001.tga
NumberOfColors=256

[Cube_1]
BasenameTGA=f00*0001.tga
Format=CompressedLZW555
PaletteId=1
Face1Resolution=128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128
Face2Resolution=128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128
Face3Resolution=128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128
Face4Resolution=128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128
Face5Resolution=128,128,128,128,128,128,128,128,128,128,128,128,128,128,128,128
Face6Resolution=0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

[Enduroger]

I tried that and it looks much better now.
Thank you for the help.