Both Teams are Full error

You need to have both info_player_counterterrorist and info_player_terrorist entities in the map, or the game will not be set up correctly. See Making levels for Counter-Strike: Source for information on the necessary entities. Also check your console. If it reports that your spawn points are invalid try moving them a little bit up to make sure they are not intersecting with anything. The problem is usually that your spawn point entities are intersecting another surface in the map (usually the ground), and thus the spawn point is invalid.