I have a NW6 SP5 server that had a problem with the CA which prohibited
Apache from loading. Once this was resolved, apache/tomcat loaded and
were were able to set up printers via the web browser. We set up
several printers and downloaded/installed the client and printers on
several workstations.

Last week we downed the server (to move it) and when we brought it back
up we can no longer install printers.

Going to http://servername:631/ipp asks for credentials (did not do that
before). Once authenticated, clicking on a printer brings up a blank
page without the printer installing. the blank page shows an icon in
the bottom right-hand corner 'Done'. Hovering the pointer over 'Done'
shows that the page completed with errors.

Any ideas?