Hey, your right.
I am using now:

flags = BRIGHT | TRANSLUCENT;
flags2 = VISIBLE;

Now it works fine.
Why can't I put everything in 1 flag?
Why are there flags and flags2?

Also, I have another question...
Hoe can I make the ENTITY* visible from somewhere else in the script?
This doesn't work:

set(ent_muzzle,VISIBLE);

Thanks.