Update your EQUI_Animations.xml file. The following should be placed after the </Ui2DAnimation> tag which closes the segment begun by "<Ui2DAnimation item="A_ROFSelected">" (which you can search for).
Code:
<Ui2DAnimation item="A_COTF">
<Frames>
<Texture>EQ_expansion_logos2.tga</Texture>
<Location>
<X>0</X>
<Y>96</Y>
</Location>
<Size>
<CX>128</CX>
<CY>32</CY>
</Size>
<Hotspot>
<X>0</X>
<Y>0</Y>
</Hotspot>
</Frames>
</Ui2DAnimation>
<Ui2DAnimation item="A_COTFHover">
<Frames>
<Texture>EQ_expansion_logos2.tga</Texture>
<Location>
<X>0</X>
<Y>128</Y>
</Location>
<Size>
<CX>128</CX>
<CY>32</CY>
</Size>
<Hotspot>
<X>0</X>
<Y>0</Y>
</Hotspot>
</Frames>
</Ui2DAnimation>
<Ui2DAnimation item="A_COTFSelected">
<Frames>
<Texture>EQ_expansion_logos2.tga</Texture>
<Location>
<X>0</X>
<Y>160</Y>
</Location>
<Size>
<CX>128</CX>
<CY>32</CY>
</Size>
<Hotspot>
<X>0</X>
<Y>0</Y>
</Hotspot>
</Frames>
</Ui2DAnimation>
If the "A_COTF..." tags are already there just make sure they reference EQ_expansion_logos2.tga and maybe try copying that file from the default folder to your custom folder if you're still getting a black box.