Inventory Marking system problem

[AndreiS 2]

Hello everyone, I'm having this syserr when installing inventory marking system by p3ng3r

0628 12:55:53104 :: Exception 
0628 12:55:53104 :: AttributeError
0628 12:55:53104 :: : 
0628 12:55:53104 :: "'AttachMetinDialog' object has no attribute 'hWnd'"
0628 12:55:53104 ::  in 
0628 12:55:53104 :: <bound method AttachMetinDialog.__del__ of <uiAttachMetin.AttachMetinDialog object at 0x04FFE950>>
0628 12:55:53104 ::  ignored

0628 12:55:53104 :: Traceback (most recent call last):

0628 12:55:53104 ::   File "networkModule.py", line 247, in SetGamePhase

0628 12:55:53104 ::   File "game.py", line 96, in __init__

0628 12:55:53104 ::   File "interfaceModule.py", line 329, in MakeInterface

0628 12:55:53105 ::   File "interfaceModule.py", line 182, in __MakeWindows

0628 12:55:53106 ::   File "uiInventory.py", line 265, in __init__

0628 12:55:53106 ::   File "uiInventory.py", line 427, in __LoadWindow

0628 12:55:53106 :: TypeError
0628 12:55:53106 :: : 
0628 12:55:53106 :: __init__() takes exactly 1 argument (2 given)
0628 12:55:53106 :: 

I went over the files again and again and I can't figure it out.. someone please help