I have updated fusion charts from V3.2.1 to newest version fusion charts XT. 
  
But when I test it on windows 2003 and windows XP the performance in IE8 was extremely slow,the scroll bar moves after I dragged for seconds. 
  
High version IE or other browsers went well,and high version system has no problem either even in IE8. 
  
Before I updated,it will render flash in IE8 and it was very fast,is there anyway to solve this problem or some setting that can make it render by 
  
using flash as old version?