Active Cast - Filter by Label

What is the syntax for Active Cast to pull articles by a label?

I have tried

<script type="text/javascript" id="lia-ac-lt-ConvergedInfrastructureDE"
src="http://h30507.www3.hp.com/t5/activecast/latestthreadspage?activecast.parent_element_id=lia-ac-lt-
ConvergedInfrastructureDE&profile.language=de&label.name=Mittelstand"></script>

and

<script type="text/javascript" id="lia-ac-lt-ConvergedInfrastructureDE"
src="http://h30507.www3.hp.com/t5/activecast/latestthreadspage?activecast.parent_element_id=lia-ac-lt-
ConvergedInfrastructureDE&profile.language=de&label-name=Mittelstand"></script>

The second is similar to the URL filter by label, which works. However, neither of the above seems to work.

(rest of the AC text not reproduced to save space)