[TYPO3-english] Create new element not working in Typo3 6.1.10

[Manish Jain]

Hi all,

I spend the whole day so far searching after this problem, but did not find a solution.

1) I've created a simple project site, with 7 pages, and sudden i am getting nothing on page, 

screencast.com/t/T2Ikrrqh7
and 
screencast.com/t/QbcLqJubLEU

Has anybody an idea or even better a solution to fix this problems? I would really appreciate any help.

Thanks,
Manish Jain