Unable to see Machine Software Info

I am running ZLM 6.6.1 on SLES9 with the following client packages:

rug-2.4.1-0.ximian.1.1
rcd-2.4.0-0.ximian.1.4
rcd-modules-2.4.0-0.ximian.1.2

If I select the Software tab in the Machines section I just get "No
packages found". I can view the Hardware info OK.

Any ideas?
Thanks.