Skybox isn't loading.

I want to test my CS:Source map quickly, so I just draw a large cube
around it, hollow it out, and apply the tools/toolskybox texture to it.

In map properties you can select which skybox you want, but nor the
default (sky_wasteland02), nor the ones I define myself work ... getting the hall of
mirrors effect everywhere where there should be sky ...

I place my map in the counterstrike source / cstrike / maps folder, that's allright, right ?

edit

OK, I fixed it myself.

The default skybox is not available yet
for use in maps. Use the texture browser to look for available ones.
Remember to remove the suffix at the end if you input it in the
properties field.

There is already a solution to this posted. That is why they make you
search before you can post a new topic. Just a FYI. No harm done.