Error Attaching .mdf File

I have a VBExpress 2008 application that uses LINQ to SQL to manipulate data in an SQLExpress 2005 database.

I successfully instatiate a DataContext object and examine its metadata through its .Mapping methods and properties. But when I attempt to set the DataSource for a BindingSource control to one of the tables, I get a run-time error.

Specifically:

Dim dc As New DiabetesData(My.Settings.DiabetesData_dbPath)

For Each mt As MetaTable In dc.Mapping.GetTables

...(examine some properties)...

Next


frmEZView.bsPrimary.DataSource = dc.GetTable(Of BGTest)()


generates the error:
System.Data.SqlClient.SqlException was unhandled
Class=14
ErrorCode=-2146232060
LineNumber=65536
Message="An attempt to attach an auto-named database for file SbearMedicalDiabetesDiabetesData2.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share."
Number=15350
Procedure=""
Server="\.pipe8280AA0D-38A6-41 sqlquery"
Source=".Net SqlClient Data Provider"
State=1



From the Immediate window: ?My.Settings.DiabetesData_dbPath

"SbearMedicalDiabetesDiabetesData2.mdf"


bsPrimary is a BindingSource on a form named frmEZView.


Public Class DiabetesData includes a property Public BGTests As Table(Of BGTest) and a subsequent definition of BGTest.


Can anyone tell me what I'm doing wrong?

Thanks,
--Mable