I had the same problem-just wouldn't launch! Fellow Forum Member- Lord of the Rings was very helpful to me and lead me to a link where others were having the same problem and they found the 'fix' by uninstalling and reinstalling your 'JAVA PLATFORM' - go here to do so:
www.java.com/en/download/manual.jsp.
but download the 'OFFLINE' version. but first uninstall your current version. I dd and it launched right away. goood luck ! Sorry the url didn't come out as a hyperlink- just copy and paste it into your URL line.