MDAC 2.6 or above required for .NET access

I am looking for help in this error message when running my c# program, which opens an Access database (.mdb)
created with MS Access 2000.

First of all, here is my code:

 string OMconnectionString = 
                
                //"Driver={Microsoft Access Driver (*.mdb)};"+
                "Provider=Microsoft.Jet.OLEDB.4.0;"+
                "Data Source=OslerMedicine.mdb;"+
                   "User Id=admin;Password=";
                
                
            msaCnn = new OleDbConnection(OMconnectionString);
            try
            {
                msaCnn.Open();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Exception: " + ex.Message);
            }
            OleDbCommand msaCmd;

I'm getting this error when trying to open the OLE DB connection:

ex.Message = "The .Net Framework Data Providers require Microsoft Data Access Components(MDAC). Please install Microsoft Data Access Components(MDAC) version 2.6 or later."

I have run the component checker program: (cc from Microsoft)

I have received a confirmation that I am running MDAC 2.8 SP1 on Windows XP SP3.

How do I go about correcting this? I have uninstalled by right clicking on i:\windows\inf\mdac.inf and selecting
"Active Uninstall" and then doing an active reinstall, then restarting.

Thanks
Mike