hammer wheatley screen problem

[Momonga]

I'm doing a map for portal 2 in a wheatley chambers theme and I was using wheatley screen instances.

Everything was okay until today, I compiled the map like usual but the screen didn't wanted to be shown. I even made a simple map from scratch to see if it's just on my map that I'm working on, even there it's not working.

Does anyone has a similar problem?

in case if you're asking, I'm using hammer ++ so maybe it might be the problem with that program.