invalid function call, not a valid address

[Blad_Gad]

Привет всем. возникла вот такая ошибка:

(8962) : error 012: invalid function call, not a valid address

Стока:

format(QueryG, sizeof (QueryG) , "SELECT * FROM eGarages WHERE gOwner = '%s'", PlayerName(playerid));

Вот весь stock:

stock IsPlayerGarageOwner ( playerid )
{
    format(QueryG, sizeof (QueryG) , "SELECT * FROM eGarages WHERE gOwner = '%s'", PlayerName(playerid));
    mysql_query(QueryG);
    mysql_store_result();
    if(mysql_num_rows()) return 1;
    return 0;
}