AutoCAD .NET :: Accessing Database Tables

I'm having a problem accessing data manager tables in the 2011 version.  My C# .NET code worked fine with 2010.  Here is a sample of the 2010 code that works, but returns zero length tables in 2011.

C#

ProjectPartCollection oPP = PlantApplication.CurrentProject.ProjectParts;
PlantProject oPProj = PlantApplication.CurrentProject;
Project oProj = oPP["PnId"];
try
{
//get ACAD data table
[code].......               

The last two lines fail to object any meaningful data in 2011.  In 2010, I would have all the table rows and could access tags and asset information.