I Can No Longer Play The Games ... Start To And Then It Locks Up.

I have played on POGO for years.  Now, I go into a game and start playing but it seems to lock up and I can not continue.  My computer was in for a clean up recently and now  works fine except for POGO.  I have cleaned the Internet Explorer browser cache following the instructions.  I uninstalled and reinstalled Java.  Still no change.  I tried using another browser (Google Chrome)  and that didn't work either.  Finally, I installed Firefox ... no difference.  Any idea as to what is going on?  I don't want to continue paying the monthly fee for the games unless they operate correctly.  HELP!