[Basssiiie]

Code:

SetSpawnInfo(playerid, 0, 0, 0.0, 0.0, 5.0, 0.0, 0, 0, 0, 0, 0, 0);
SpawnPlayer(playerid);

In SA-MP 0.3d R2 there's just a bug that kicks the player if you use SpawnPlayer in de class selection menu. You can avoid the kick by using first SetSpawnInfo and then SpawnPlayer, or by downloading SA-MP 0.3d R1.