[Matt]

Do not use manimod. https://www.sourcemod.net/

Before even getting to the point of installing mods/plugins make sure your server is working correctly. Setup a vanilla server and get a friend to try join with connect <your ip:port> in console to make sure everything is working.

Make sure sv_lan is set to 0 in your server.cfg, if it is what does the server console say, it should give you a reason its going into LAN mode.