Hosting a non dedicated server with bots.

[thatdudehop2it]

So I recently downloaded the map tr_walkway and I'm trying to get the bots and everything on but whenever I join it it says "You cannot change teams at this time" and there are no bots either!!! So I'm wondering how to fix this, also the server isn't hosted from a program such as the dedicated server software, but from the main menu "add server" button.