AX2012 problem with local VPC / sharepoint after copying


After copying my local AX2012 version (downloaded from partnersource) to my private computer, I noticed that the enterprise portal and the homepage in AX2012 do not work anymore. On my previous computer, everything worked nicely. But now, I always receive an error message saying that there is something wrong with the sharepoint. I am not sure but I believe that this problem could possibly be cause by the different IP addresses of my computers?! It seems that there is also an issue with the web server on my local machine?! As I do not have a solution, I would be happy receiving any comments / hints /tips.

Thank you.