System.Reflection.AmbiguousMatchException, doesn't display all data on ListView

I keep getting the error

A first chance exception of type 'System.Reflection.AmbiguousMatchException' occurred in Microsoft.VisualBasic.dll

When I want to display a ListView on load of a form. For example I have 2 rows of data in my database, but when I try to list it, it only shows the first row. I'm guessing it won't loop and populate the ListView? Here is my code:

    Private Sub AddGrades_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    Dim ClassIntl = TextBox1.Text
    DBConn()
    SQLSTR = "SELECT * FROM '" & ClassIntl & "'"
    readDB()
    ListView1.GridLines = True
    ListView1.FullRowSelect = True
    ListView1.View = View.Details
    ListView1.MultiSelect = False
    ListView1.Columns.Add("StudentID", 80)
    ListView1.Columns.Add("First Name", 80)
    ListView1.Columns.Add("Last Name", 80)
    ListView1.Columns.Add("Q1", 80)
    ListView1.Columns.Add("Q2", 80)
    ListView1.Columns.Add("Q3", 80)
    ListView1.Columns.Add("Q4", 80)
    ListView1.Columns.Add("Q5", 80)
    ListView1.Columns.Add("Q6", 80)
    ListView1.Columns.Add("S1", 80)
    ListView1.Columns.Add("S2", 80)
    ListView1.Columns.Add("S3", 80)
    ListView1.Columns.Add("A1", 80)
    ListView1.Columns.Add("A2", 80)
    ListView1.Columns.Add("A3", 80)
    ListView1.Columns.Add("PrelimExam", 80)
    ListView1.Columns.Add("MidtermExam", 80)
    ListView1.Columns.Add("FinalExam", 80)
    ListView1.Columns.Add("PrelimTotal", 80)
    ListView1.Columns.Add("MidtermTotal", 80)
    ListView1.Columns.Add("FinalTotal", 80)
        While (SQLDR.Read())
            With ListView1.Items.Add(SQLDR("StudentID"))
            .subitems.add(SQLDR("FirstName"))
            .subitems.add(SQLDR("LastName"))
            .subitems.add(SQLDR("Q1"))
            .subitems.add(SQLDR("Q2"))
            .subitems.add(SQLDR("Q3"))
            .subitems.add(SQLDR("Q4"))
            .subitems.add(SQLDR("Q5"))
            .subitems.add(SQLDR("Q6"))
            .subitems.add(SQLDR("S1"))
            .subitems.add(SQLDR("S2"))
            .subitems.add(SQLDR("S3"))
            .subitems.add(SQLDR("A1"))
            .subitems.add(SQLDR("A2"))
            .subitems.add(SQLDR("A3"))
            .subitems.add(SQLDR("PrelimExam"))
            .subitems.add(SQLDR("MidtermExam"))
            .subitems.add(SQLDR("FinalExam"))
            .subitems.add(SQLDR("PrelimTotal"))
            .subitems.add(SQLDR("MidtermTotal"))
            .subitems.add(SQLDR("FinalTotal"))
        End With
    End While
End Sub

Any suggestions would be great. Thanks in advance!