Two report viewers couldn't run same time in vb.net

[Sashika_1]

hey, I need help :) Now I realized that this problem. In my software there are many reports. I used report viewer (defualt comes with visual studio) control for reporting. All the other forms loaded to MDI paren form.
I run one of report. Then I run another report then the second report doesn't view. It shows only loading.
I'll put my code which I used for generate reports.

 Private Sub report_of_all()
        Dim ds As New DataSet
        Dim dt As New DataTable
        Dim RpDs1 As New Microsoft.Reporting.WinForms.ReportDataSource
        Dim SQL As String = "select * from moneycs.collector"
        Dim da As New MySqlDataAdapter(SQL, con)

        da.Fill(ds, "All_Collectors")
        dt = ds.Tables(0)
        Me.ReportViewer1.Reset()
        Me.ReportViewer1.LocalReport.DataSources.Clear()
        RpDs1.Name = "Centers"
        RpDs1.Value = dt
        Me.ReportViewer1.ProcessingMode = Microsoft.Reporting.WinForms.ProcessingMode.Local

        Me.ReportViewer1.LocalReport.ReportPath = System.Environment.CurrentDirectory + "\All_Collectors.rdlc"
        Me.ReportViewer1.LocalReport.DataSources.Clear()
        Me.ReportViewer1.LocalReport.DataSources.Add(New Microsoft.Reporting.WinForms.ReportDataSource("All_Collectors", ds.Tables(0)))

        Me.ReportViewer1.ZoomMode = Microsoft.Reporting.WinForms.ZoomMode.PageWidth
        Me.ReportViewer1.RefreshReport()
    End Sub

guys please help me..... Appreciate your experties help :)