I have the middle tier server installed and working and now I am trying to get some reporting to work.
I followed the instructions in the documentation for installing the XML reporting:

The problem is when I add this line to the httpd.conf file:
Sys:/public/Reporting/canned/Nal Reports/zfdamrServlet.conf

Then the middle tier stopped working (i.e. the Zen agents could no longer connect via the middle tier server login).