ox.execute, mysql_query problem! Need help!

Dear EPVP community!

I've got 1765 game with 1866_db

I've got problem some functions. for example: os.execute command.
When i restart my server the os.execute command is good(Dragon ticket.)
But some hours go wrong. :(

My quest:

quest start begin
state start begin
when 99995.use begin
say("Gratulálok! A jóváírás sikeres volt.")
syschat("A számládhoz jóváíródott 500 sárkány érme!")
pc.remove_item(99995, 1)
-- local ID = pc.get_account_id()
-- local nev = pc.get_player_id()
-- local KARI = pc.get_name()
-- local item99995 = 99995
-- mysql_query("INSERT INTO TestPVPaccount.dragoncoins_log VALUES ("..ID..",'"..nev.."',NOW(),"..item99995..");")
-- mysql_query("UPDATE TestPVPaccount.account SET coins = coins + 500 WHERE id = "..ID..";")
os.execute("php /usr/home/teszt/pvp/share/locale/germany/quest/dc.php "..pc.get_account_id().." "..pc.get_player_id().." 500 99995")
end
end
end

comment the mysql_query because this same wrong some hours....
i try os.execute but similar this.

Best Regards
Cris