[Hilfe] Login system problem

function onRegister( Username , Password )
	local sql = dbQuery(handler,"SELECT * FROM players WHERE Username = '"..Username.."'")
	local result,num_rows = dbPoll(sql,-1)
	if num_rows == 0 then
    	local Passwortverschluesselt = md5(Password)
    	dbExec(handler,"INSERT INTO players (Username, Password) VALUES ('..Username..','..Passwortverschluesselt..')")
    	outputChatBox("Du hast dich erfolgreich registriert!",source,125,0,0)
	else
    	outputChatBox("Du bist bereits Registriert!",source,125,0,0)
	end
end
addEventHandler("onRegister",getRootElement(),onRegister)


function onLogin ( Username , Password)
	local Passwortverschluesselt = md5(Password)
	local sql = dbQuerry(handler,"SELECT * FROM players WHERE Username = '..Username..' AND Password = '..Passwortverschluesselt..'")
	local result,num_rows = dbPoll(sql,-1)
	if num_rows== 1 then
    	outputChatBox("Du hast dich erfolgreich eingeloggt",source,125,0,0)
		triggerClientEvent(source,"closeLogin",source)
	else
    	outputChatBox("Dein Passwort oder dein Username ist falsch!",source,125,0,0)
	end
end
addEventHandler("onLogin",getRootElement(),onLogin)