MTConnect extended variable

I have a custom created variable which I need to read into KepServer. My variable is an extended variable, a key-value pair:

<DataItem sampleRate="1000" type="e:VARIABLES" subType="x:COMMON" category="EVENT" id="L2p2CommonVariable" name="p2CommonVariable"/>

I have configured the IT but it keeps complaining about the data type.

Any help is appreciated.