dcmd_setleader Errors. Bitte helfen

hi habe bei folgendem code 3 errors:
if(Spieler[playerid][admin] >= 2)
{
new id,GangID;
new string[200];
new pname[MAX_PLAYER_NAME];
new anname[MAX_PLAYER_NAME];
if(sscanf(params,"ii",id,GangID))
{
return SendClientMessage(playerid, 0xFF0000FF, "Benutzung: /setleader [playerid] [GangID].");
}
GetPlayerName(id,pname,sizeof(pname));
GetPlayerName(playerid,anname,sizeof(anname));
if(GangID == 1 || GangID == 2 || GangID == 3)
{
if(Spieler[id][gang] == GangID); //(4979) : error 036: empty statement
{
Spieler[id][rang] = 1;
format(string,200,"Du hast %s zum Leader gemacht.",pname);
SendClientMessage(playerid,0xFFFA00FF,string);
//SendClientMessage(id,0x9600FFFF,string);
}
else //(4986) : error 029: invalid expression, assumed zero
{
//SendClientMessage(id,0x9600FFFF,string);
format(string,200,"Du hast %s zum Leader gemacht.",pname);
SendClientMessage(playerid,0xFFFA00FF,string);
Spieler[playerid][gang] = GangID;
Spieler[playerid][rang] = 1;
}
else // (4994) : error 029: invalid expression, assumed zero
{
return SendClientMessage(playerid,0xFF0000FF,"Diese GangID gibt es nicht.");
}
}
}
}