[Neos] Site Import Error

[Oliver Beck]

Hi neos guys!

First: Congratulations to the neos team for the first stable release! great work! 

I get an error at the installation step 2:

Error: During the import of the "Sites.xml" from the package "TYPO3.NeosDemoTypo3Org" an exception occurred: Error: During import an exception occurred: "SimpleXMLElement::__construct() expects parameter 2 to be long, string given". 

after i can't access the frontend or backend. Does anybody know this error? 

thanks for any replies!