I've try to use the component in subject but it seems not working when the field specified in "Data Field property" is NULL.
The error occurs is: "OLE Error: generic error".
If I use a table with values populates all works fine.
You didn't manage NULL values?
The problem is that for NULL there can't be a lookup relationship, so, I'm not sure how you'd expect the component to work for field values where there is no lookup relationship?