if I am not mistaken it should read this.......
<InvSlot item="Invslot 7">
<ScreenID>Primary</ScreenID>
<!--<Font>3</Font>-->
<RelativePosition>true</RelativePosition>
<Location>
<X>172</X>
<Y>138</Y>
</Location>
<Size>
<CX>40</CX>
<CY>40</CY>
</Size>
<Background>A_InvArms</Background>
<EQType>7</EQType>
<Style_VScroll>false</Style_VScroll>
<Style_HScroll>false</Style_HScroll>
<Style_Transparent>false</Style_Transparent>
<!--<TooltipReference/>-->
</InvSlot>
hope this helps you