AutoCAD .NET :: Plot DWG With Centered Attributes

My routine inserts in modelspace different blocks with attributes in it with justification "Center".After the blocks are inserted and the attributes are filled, it all looks good in Autocad.Then I want to plot the DWG.

The problem is that the centered attributes in the plot are then justified to "Left" ?When I run my routine the second time in the same drawing then it goes well.It looks like the attributes or blockreference isn't updated well in the database after insert?

      public static BlockReference InsertBlockReference(Database database, string filename, string blockname, Point3d
        insertionpoint, Scale3d scalefactor)
         {
             using (DocumentLock documentLock = Active.Document.LockDocument())
             {
                 using (Transaction transaction = database.TransactionManager.StartTransaction())
[code]..