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 Counter-Strike: Source Level Creation for information on the necessary entities. Also check the 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. (Unlike HL2SP and HL2DM spawn point entities, CS:S spawn point entities will intersect the ground if not placed a couple of units above it.)