Sky Problems

Ok well I had my GF4 MX 440 64 meg card and my FS Sky World was working great(besides killing my FPS) then the sky started turnng into white squarish things..I figured I just needed reinstall but never botherd now I have my GF 6800 Ultra and it was doing the same thing but now the clouds are I guess 3d but they are very very thin and dont look like clouds at all and there are several layers of them but I got the "white skys" to go away...so anyone have any idea on what is causing these cloud deformaties and no I dont have my clouds set to "Simple" do that it looks lke your sky is artifacting with these textures....
Here is a pic of what it looks like(these clouds have anout 100 ft of "depth or mass"...

Here is a pic of what it looks like(these clouds have anout 100 ft of "depth or mass"...
