Quote - I installed the java download and now I get the "page cannot be found" message more reliably, and that's an improvement.

Do you have the free Flex on/ Flex off script to switch the library on or off? If you have it this can be another problem - in my case I changed the LSM_GUI.html one to LSMGUI_html without giving it a thought - that resulted in your IE display "page not found".

If that's not the case, I hope someone else finds a solution for you.