Ok, I will go straight to the problem. 'Coz I don't want to take your time..
When I try to play Soldat, it opens and all that..I choose map and click Play and bam..it freezes, but the weird thing is that I could play like 30 minutes ago. Any ideas why is my computer doing this? =\ Thanks in advance.

Does it gives any error or stuff?

Uhm no it doesn't..It just freezes without any error.

Can you run the game in windowed mode? (uncheck Fullscreen in config.exe).