It must be the browser issue. Please check and make sure that flash plugin is installed. Also cross-check your browser settings by following below link (section "2.1 Microsoft Internet Explorer Settings") -
I am facing the same problem.
I am using Windows 8, IE 10. I need to click F12, to change the Browser Mode to IE 7 to open BAM application. Everything works fine until I came to set Alter the exactly same location. I am getting the same error.
I installed IE tab for FireFox. Now I am able to open BAM applicaiton FireFox, but getting the same error at the same place.
Thank you very much for your help or any information,