Problem with Outlook 2007 "Cannot open your default e-mail folders"

Cannot open your default e-mail folders.  You must connect to Microsoft Exchange with the current profile before you can synchronize your folders with your offline folder file.

Using Outlook 2007 and Exchange 2010

Before I've tested Outlook Anywhere (last Week i enabled the Service on Exchange) it never worked so i leave it behind. But today the problems started on two of our Office 2007 Users, the checkbox on connection settings was set to "Connetc to Microsoft Exchange Using http" after restarting it was automatically enabled again.

So i tried with my Useraccount on the PC without no Problems, after research i triedt several things but at last I decide to set up the userprofil new. The Problem occours stil on this one User.
HelpdeskJBCAsked:
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HelpdeskJBCAuthor Commented:
Success ;-) so many possible solutions for this Problem on the www, but everyone has a different solution.

The Problem was simple:
On a second PC Outlook 2003 was running with the same account after closing it everything was fine

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