WorkItemLinkFilters - FilterOn does not work?!

Question

Hey,

I've a question about the Link Filters of a Link Control in Team System. I want a list in which I only see workitem "xyz" with the link "links to" (<- reversename, forwardname: linked by).

Here is a sample of what I try:

<WorkItemLinkFilters FilterType="include">
  <Filter LinkType="Unsere.LinkTypes.Links" FilterOn="reversename" />
</WorkItemLinkFilters>
<WorkItemTypeFilters FilterType="include">
  <Filter WorkItemType="xyz" />
</WorkItemTypeFilters>
<ExternalLinkFilters FilterType="excludeAll" />

But I guess I have some problems with the "FilterOn" attribute. It took a while until it even imported my definition. First I tried to write the reversename itself ("link to"), but it didn't import that. The import acceppts "reversename" as parameter, but in the filter list I still get all xyz workitems, no matter in which direction they are linked.

Any help?