InputBox Error

#include <ButtonConstants.au3>
#include <EditConstants.au3>
#include <GUIConstantsEx.au3>
#include <ProgressConstants.au3>
#include <StaticConstants.au3>
#include <WindowsConstants.au3>
#Region ### START Koda GUI section ### Form=
$Form1 = GUICreate("Einloggen", 311, 108, 192, 124)
$Label1 = GUICtrlCreateLabel("Moderator/en:", 8, 16, 72, 17)
$Label2 = GUICtrlCreateLabel("Passwort:", 8, 40, 50, 17)
$Input1 = GUICtrlCreateInput("", 88, 16, 217, 21)
$Input2 = GUICtrlCreateInput("", 88, 40, 217, 21)
$Button1 = GUICtrlCreateButton("Einloggen", 224, 64, 81, 25, $WS_GROUP)
$Progress1 = GUICtrlCreateProgress(0, 88, 310, 17)
GUISetState(@SW_SHOW)
#EndRegion ### END Koda GUI section ###

While 1
$nMsg = GUIGetMsg()
Switch $nMsg
Case $GUI_EVENT_CLOSE
Exit
Case $Button1
_logon()
EndSwitch
WEnd

Func _logon()
If $Input1 <> "JoNi" Then
GUICtrlSetData($Progress1, 50)
Else
MsgBox(16,"Fehler!","Benutzername falsch!")
EndIf
If $Input 2 <> "12345678" Then
GUICtrlSetData($Progress1, 100)
MsgBox(0,"","Eingeloggt!")
Else
MsgBox(16,"","Passwort falsch!")
EndIf
EndFunc