System copy 'Homogeneous' from MSSQL2005 to SQL2012 on Windows

Hi All

I am trying to do the System copy 'Homogeneous' from MSSQL2005 to SQL2012 on Windows.

I detached DB from source system and attached to the target system.

Then I run SAPInst from SWPM cd,

And selected homogeneous copy from existing DB, but it gives the following error and unable to continue the installation.

       " User tables belonging to the dbo schema were found in the database S11.

SOLUTION: You can only install an SAP system in a database with no user objects belonging to the system schema dbo.

If there already is an SAP system in the database (MCOD), or you install a Java Add-In, you might have to convert the existing system to its own schema, or contact your SAP support.  "

Anybody can help me to resolve this issue?

Thanks

Sel