need help with some l4d2 hammer problems I'm having

[Lucinice]

I'm having some problems with l4d2 in hammer and I need some help. No common infected spawn unless I use a bile bomb and when I use a bile bomb the zombies that do spawn are the ones from l4d1. Can someone help?

EDIT

I just managed to fix the spawning isuue but the zombies are still the ones from l4d1, also how do I get uncommon common infected to spawn?

[Lucinice]

Does anyone atleast know how to put in uncommon common?