You may want to move this to a different location that will give you a higher chance of a response like Geodatabase .
I am assuming based on your error message that you are using SQL Server for your geodatabase, correct?
Can you also provide the version of ArcGIS Desktop, version of SQL Server and version of the Geodatabase.
What system permissions do you have in SQL Server (sysadmin, etc.)?
It appears that SQL Server thinks that you are not the owner of the data. Is your user name and schema matching in SQL Server Management Studio?