How is the software installed across a network, does any software need to be installed on the clients?

Open IE on manager server to diagnose. Enter http://print:8100 (suppose print server name is print). If the page doesn't display "PrintUsage Http(App) Server is Running...",the possible reasons are:

Remote or local PrintUsage HTTP service doesn't startup. To Restart the corresponding HTTP service can solve problem.
Manager server cannot resolve print server's IP through computer name, so it cannot connect to HTTP service to retrieve the print content. This occurred often because print server and manager server don't belong to the same subnet or domain. Currently communication between PrintUsage servers is based on computer name, so an entry should be added into HOSTS file of manager server in order to correctly access print server by computer name. Open Hosts file in C:\Winnt\System32\drivers\etc\Hosts and add a line xxx.xxx.xxx.xx print. Here xxx.xxx.xxx.xx refers to IP address of the print server, print refers to the computer name of the print server, and then save and exit.

If page can open normally and displays “PrintUsage Http(App) Server is Running...”, that means the communication with print server is OK. Then the problem may result from retrieving the print image file. The possible diagnosis are:

Firstly to make sure print content file was not removed;
Secondly to make sure path of saving print in system settings is correct.
If path has been changed ever, after reinsatallation, the path should point to the correct folder for saving print content and restart HTTP service to get previous saved files.