I Got Your Problem,
Even I Had Same Problem And I Did Two Things Which Solved My Problem. Although Any One Of Them Was The Cause But I Did Both.
1. Turn Your Antivirus Or Firewall Or Both Off For Timebeing.
2. Now Install Adobe Flash Player. Although You Installed It But You Need To With Another Method.
Follow For Installing:
First Install Latest Player From Adobe Using INTERNET EXPLORER ONLY.
Your Problem Is Most Probably Vista. Even If It Is Not Keep Continuing.
Browse To C:\Windows\System32\Macromed\Flash
Now Right Click FlashUtil9d.exe And select Run As Administrator And Click Continue On Vista uac Box. Just Double Click If XP Or Other Than Vista.
It Will Say An Update Is Avalaible. Hit Install Now Let It Update. Would Take Seconds
You Are Done.
Now You Can Use SEUS Without Any Interruptions.
Please Reply If It Helps.




