When you create a new film script, the first page you see is a title page.
The page after this title page is the one where you generally type in your scenes.
It looks like you are facing some issue and not able to delete any text.
Can you please send me this script so that I can have a better look at your issue?
You can save this script to disk by using option 'File -> Save to disk'. This will create a '.stdoc' file on your system.
Just mail this '.stdoc' file to me at 'roverma <at> adobe <dot> com'
Thanks