Can use some items how to fix?

[Byllan]

I can't use Focus Cape and Robe of underworld in my server how to fix it?

 

[MiPo91]

Add these to the specific item id:

<item id="8890" article="a" name="robe of the underworld">
	<attribute key="weight" value="3100"/>
	<attribute key="armor" value="12"/>
	<attribute key="slotType" value="body"/>
	<attribute key="absorbPercentDeath" value="12"/>
	<attribute key="absorbPercentHoly" value="-12"/>
	<attribute key="magicpoints" value="5"/>
</item>
<item id="8871" article="a" name="focus cape">
	<attribute key="weight" value="2100"/>
	<attribute key="armor" value="9"/>
	<attribute key="slotType" value="body"/>
	<attribute key="magicpoints" value="1"/>
</item>