When I install the mods and launch my server there not there only the Mani admin mod shows up in config,
the mod i installed was zombie mod but I don't know how to start up mod?
In order for the mods (zombie mod) you will need to install Sourcemod and update it. you will also need Eventscripts for some of the plugins or addons to work.
In your gameservers account click the config tab. Then at the top click the mods tab. there is a Sourcemod mod(click and install) Do the same for the Sourcemod update. Then click and install Eventscripts. You should be good to go after that.
Ig this doesn't work, you can allwayse create a ticket and the devs at gameservers will help out as well. They are very helpful and can probably install it for you..
Hope this helps. If not PM me and I will help ya as much as I can.. As I have just been through and done all that myself..