＆＃39; IErrorInfo.GetDescription失败了E_FAIL（0x80004005）＆＃39; VB.Net中的OleDbDataReader出错

Question

有谁可以告诉我为什么我的代码会给我System.Data.OleDb.OleDbException和IErrorInfo.GetDescription failed with E_FAIL(0x80004005)错误？他们在同一个地方。错误出现在Reader = Command.ExecuteReader()行。这是我的代码：

If Not Page.IsPostBack Then
        Dim Connection As OleDbConnection
        Dim Command As OleDbCommand
        Dim Reader As OleDbDataReader
        Dim ConnectionString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\KayJoy\Documents\University\UJ Official Documents\Informatics\2A\P02.accdb"
        Connection = New OleDbConnection(ConnectionString)
        Connection.Open()
        Dim CommandString As String
        CommandString = "SELECT * FROM Module"
        Command = New OleDbCommand(CommandString, Connection)
        Command.CommandType = CommandType.Text

        Reader = Command.ExecuteReader()
        If Reader.HasRows Then
            Do While Reader.Read
                Response.Write(Reader("M_Code") & ",")
                Response.Write(Reader("M_Name") & ",")
                Response.Write(Reader("M_Credit") & "<br/>")
            Loop
        End If
        Command.Connection.Close()
        Command.Dispose()
        Connection.Dispose()
    End If