[Steven82]

Use this coding instead since you don't really have any information specified. But i am guessing it's a CnR or DM/TDM gm. Or use the coding posted above.

pawn Code:

public OnPlayerRequestSpawn(playerid)
{
    if(GetPlayerSkin(playerid) == 1)//the skinid of your special class)
    {
        if(GetPlayerScore(playerid) >= 100)
            return 1;
        else
            SendClientMessage(playerid, COLOR, "Error: You don't have 100 score!");
    }
    return 1;
}