Hi Ashish,
I have tomcat7 and it does not work too.
I am trying to view the 'App Preview'. App preview should show you the html5 UI without any data. Tomcat is not necessary for it.
There are other custom apps i have written which launch fine. But in this case, it is the standard app with no changes done to it.
Thanks for the help. Keep more ideas flowing.
Regards,
Varun