Help me pls ! error in VB.Net connection false to Crystal Report XI

[se_juneki]

Hi,
I will do project VB.Net 2003 ,I have error runtime but i don't know it's mean.
I wan't query sql show in CrystalReportViewer . But is error
Somebody please help with the code or a way of fixing this problem.

Code

Dim report As New Report1
Dim SqlString As String = "SELECT * FROM TBL_FJT_TEST WHERE ID_LOT_NO ='" & dmRow_Id & "'"
CrystalReportViewer1.ReportSource = report

Dim dt As New DataTable
Dim da As New SqlDataAdapter(SqlString, conn)
da.Fill(dt)

report.Database.Tables(0).SetDataSource(dt)
CrystalReportViewer1.ReportSource = rpt1