How to fix "Error while unloading appdomain." error in VB.net?

Hello,

Using VB.net in VS2010.

I have a Main form and then a Reports form.  This Reports form has a ReportViewer, called rptExpenses.  When I load the Reports form, the following code runs:

Private Sub frmReports_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim SQLText As String = "SELECT * FROM expenses"
        Dim SQLData As DataTable = DBGetTable(SQLText)
        Me.rptExpenses.LocalReport.DataSources.Clear()
        Dim rprtDTSource As Microsoft.Reporting.WinForms.ReportDataSource = New Microsoft.Reporting.WinForms.ReportDataSource(SQLData.TableName, SQLData)
        Me.rptExpenses.LocalReport.DataSources.Add(rprtDTSource)
        Me.rptExpenses.LocalReport.ReportPath = "C:\Users\Jason\Documents\Visual Studio 2010\Projects\Remote-Expense\Remote-Expense\Report1.rdlc"
        Me.rptExpenses.RefreshReport()
    End Sub

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Here's the problem: Everything works fine, however, when I exit the entire application (not the Reports form), I get the following error:

Screenshot:Commenting out this one line removes the error:

Me.rptExpenses.LocalReport.ReportPath = "C:\Users\Jason\Documents\Visual Studio 2010\Projects\Remote-Expense\Remote-Expense\Report1.rdlc"

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[u]Questions:[/u]
What am I doing wrong?
And how can I fix it?

Thanks!