I have had problems with the placement of thing in the .cfg files.
Try moving the lines to the very top of the before anything else. This will let you know if any of the other entries are causing problem.
At one time I had an empty class name before a hostname of the same class and nothing worked. When I moved the host name above all the class names it started working.
Robert I'm going to move my hobbit-clients.cfg and client-local.cfg entries for the monitor and test.
My OS is HP-UX 11.31 on the server and 11.11 on the client. The sudoers file permissions are 440 bin:bin, but the file monitor does have stats available on the bbdisplay. Regardless, I'm testing with a world readable file too.
Here's what gets reported to the server from the client.
[file:/opt/iexpress/sudo/etc/sudoers] type:100000 (file) mode:440 (-r--r-----) linkcount:1 owner:2 (bin) group:2 (bin) size:7076 clock:1216388957 (2008/07/18-08:49:17) atime:1216388812 (2008/07/18-08:46:52) ctime:1216388812 (2008/07/18-08:46:52) mtime:1216388812 (2008/07/18-08:46:52)
[file:/etc/sudoers.test] type:100000 (file) mode:444 (-r--r--r--) linkcount:1 owner:2 (bin) group:2 (bin) size:7066 clock:1216388957 (2008/07/18-08:49:17) atime:1216385983 (2008/07/18-07:59:43) ctime:1216385990 (2008/07/18-07:59:50) mtime:1216385990 (2008/07/18-07:59:50)