Creating Environment textures for Blender

Hey guys,

i’m searching for someone who can give me a hint why my environment textures for Worldbackground don’t work.
I created several pictures by hand and with spacescape, as png (cross projection) and as .dds, and they show up pink or wrong maped.
Does anybody know where the problem is?
If needed i can upload the .dds and png files i’ve made.

Dr. Console

Please post the .blend with pictures packed in.