hmmm I am puzzled now because I had the same problem...I installed and no libraries, just a blank box where the libraries should be.

I installed the right version of flash on ie 8 and on firefox... and looked at the folder
file:///C:/Program%20Files/Smith%20Micro/Poser%208/Runtime/ui/Flex/LSMGUI/bin-release/LSMGUI.html#

I can see the runtimes fine....except in poser.  I have restarted poser severl times and nothing but it working in the browser.   Ideas?