I think you may find your issue is related to Flash Player. There was a patch required for Captivate 4 when Flash Player 11 came out. The download link for the patch is here:
http://blogs.adobe.com/captivate/2012/04/adobe-captivate-4-and-flash-p layer-11-issue.html
UPDATE: Just re-read the blog post about the patch for Cp4 and it was mainly related to being unable to use widgets after installing Fp 11. But it's still worth a try.