problems with Vista

Hi, could anyone help me?
Editor only works on list page. I can't change into another page to edit, like add page.

I'm able to click column properties to edit only one time.

I have to close the project and open it again to edit, it's so weird.
Thanks <img src='https://asprunner.com/forums/file.php?topicimage=1&fieldname=question&id=12794&image=1&table=forumtopics' class='bbc_emoticon' alt=':)' />