Quest status=block

[monarchis2 16]

Can someone fix this for me? I want to make a quest and the player doesn't getting banned. Here's the mysql_query command: mysql_query("UPDATE account.account SET status ='BLOCK' WHERE id =(SELECT account_id FROM player.player WHERE name ='"..pc.get_name().."');")

I test this too and didn't work : mysql_query(string.format("UPDATE account.account SET status = 'BLOCK' WHERE id = %d;", pc.get_account_id()))

What's wrong?