Need Correct Server.Cfg Lines for L4d*L4d2

[Deathrow Bo Dean]

I'd like someone who has a working L4d or L4d2 dedicated server to give me the correct lines for me to put in my server.cfg so that I can be able to start L4D and or L4D2 in Coop or Survial mode.

as of now my server.cfg gamemodes stuff looks like this.
--------------------------------------------------------------------
// sv_gametypes = "coop,versus,realism,survival,teamversus,"

sv_gametypes "versus,coop,"
sv_gamemode "both"
--------------------------------------------------------------------
When i enter in console "sv_showtags" I get public coop, versus on the first line ok.

also adding mp_gamemode does not work.