[xwiki-users] Problems with XAR Import into a new wiki on version

Hi! I want to install a new xwiki using tomcat and MSSQL. I already successfully installed this combination with an older version of xwiki. But however when I try to import the XAR File into XWiki I always get the following error in german: Importiere xwiki-enterprise-wiki-2.2.5.xar: Fehler während der Vorbereitung des Imports Translated into English this would mean about: There has been an error during the preparation of the import. What is the reason for that, is it possible that the XAR file on the xwiki website may be corrupted? Or is this a MSSQL problem. Please help me! Thanks, Florian