I have the same problem on the office PC but not on my home PC.
In the office I can call up the page, input the figures, press "Show" and I think the actual figures appear for a milli-second but then aren't viewable.
Whereas at home I have no problems, I even tried it last night at home and it worked fine.
I think there may be a set up difference but I'm not sure what. - Both my office and home PC use XP with Windows 2003, similar spec machines so maybe there is a difference in the Java settings between the two machines or there is a windows update that has been installed in the office but not at home
Sorry I can't offer a solution
efm