RT Camera screen is pitch black.

[sHell.w]

Ok, here's what I did:
1) Made a RT camera
2) Spawned a RT screen

And all I is pitch black screen. Also tried to apply rendertarget material on a prop, still black.

I really want to get this working :(. I'd suggest that some vmt file is messed up, because I had installed a texture pack loooong loong time ago. Maybe someone could lead me to the texture names that rt camera screen uses.. already watced tv_plastma, rt_screen, rendertarget.vmt - they don't exist at all. Any clues are welcome!

Thanks in advance!