Make sure you're waiting long enough - don't refresh the pages until you are sure there is a problem as IE can take a while to pick up the Plug in. For us, it normally took 10-15 seconds before the yellow bar appears at the top of the window which allows you to install. Once you have agreed to install, it can then take another 10-15 seconds for the install dialog box to appear. Once you agree to the install, the rest of the process should be much faster.

I have IE 8 and deffinately get a problem.

I'm using Firefox now which seems to be working fine.