okay what i can see is wrong and would fit the error message, is something you mentioned and tried yourself
put HB_invslot30 instead of invslot30 in these tags
Code:
<InvSlot item="InvSlot30">
<ScreenID>InvSlot30</ScreenID>
and in these
Code:
<Pieces>InvSlot36</Pieces>
<Pieces>InvSlot39</Pieces>
<Pieces>InvSlot38</Pieces>
<Pieces>InvSlot37</Pieces>
<Pieces>InvSlot35</Pieces>
<Pieces>InvSlot30</Pieces>
<Pieces>InvSlot34</Pieces>
<Pieces>InvSlot33</Pieces>
<Pieces>InvSlot32</Pieces>
<Pieces>InvSlot31</Pieces>
for all the slots that has anything with invslot to do, so you got a little bit of scripting to do.