Microsoft Access 2013, ADODB, CurrentProject.Connection don't work

I have installed Office 2013 Professional on a Windows 7 computer.

Following code works if I save the database as an mdb file:

Private Sub bntTest2_Click()
    Dim cn As ADODB.Connection
    Set cn = New ADODB.Connection
    cn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=H:\testKopia.mdb;"

    Dim rs As ADODB.Recordset
    Set rs = New ADODB.Recordset
   
    sSQL = "SELECT Kundnamn FROM tblKund;"
    rs.Open sSQL, cn, adOpenDynamic, adLockOptimistic
   
    Do Until rs.EOF
        Debug.Print rs.Fields(0).Value
        rs.MoveNext
    Loop
    rs.Close
    Set rs = Nothing
    cn.Close
End Sub

If I save the same databasfile as an accdb file I get following error message:

"Unrecognizable database format" (80004005). Execusion stops at the connection row.

If I change the connection string like this:

cn.Open "Provider='Microsoft.ACE.OLEDB.12.0';'Data Source=H:\testKopia.accdb';Persist Security Info=False;"

I get following error message:

"Could not find the Provider. It may not be properly installed." (Runtime error '3706').

I have following references:

- Visual Basic For Applications

- Microsoft Access 15.0 Object Library

- OLE Automation

- Microsoft Office 15.0 Access database engine Object Library

- Microsoft ActiveX Data Objects 2.8 Library

Have I missed a reference or is there something missing in the installation? It is a standard installation.

/Hans

Hans Hansson