I had the same exact problem
Do you have spyware blaster installed? I think that was causing my problem -- it "protects" against installation of activex controls
I actually reformatted yesterday.. reinstalled windows, pirated .. erm, I mean installed, almost all of my old software, and lsacd on the web is working fine now.
BTW you're using internet explorer right? And you have all the windows updates? And you're on PC? Did you download the omniform installer program? Visit the page in firefox (web browser you can get from firefox.com) and it will give you the direct download link for the installer for omniform