DataGridView and SQL Server

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Hi

I have a datagridview that is filled with data from Sql Server, and this
works fine. But I will be able to make changes in the datagridview that is
saved in the database.

My code:
Sub FillGridTest(SQ L as string, connString as string)
Dim sqlConn As New SqlConnection(c onnString)
sqlConn.Open()
Dim sqlDAP As SqlDataAdapter = New SqlDataAdapter( SQL, sqlConn)
Dim dsWaitingImport s As DataSet = New DataSet("Import s")
sqlDAP.Fill(dsW aitingImports, "Imports")
dataGrid.DataSo urce = dsWaitingImport s.Tables("Impor ts")
sqlConn.Close()
End Sub

for the update I have tried:
If Not dsWaitingImport s.Tables("tblIm port_Spec").Get Changes Is Nothing Then
sqlDAP.Update(d sWaitingImports .Tables("Import s").GetChang es)
End If
But I got this error:
Update requires a valid UpdateCommand when passed DataRow collection with
modified rows

Anyone than can help me?

Thanks/ Nettan