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(SQL as string, connString as string)
Dim sqlConn As New SqlConnection(connString)
sqlConn.Open()
Dim sqlDAP As SqlDataAdapter = New SqlDataAdapter(SQL, sqlConn)
Dim dsWaitingImports As DataSet = New DataSet("Imports")
sqlDAP.Fill(dsWaitingImports, "Imports")
dataGrid.DataSource = dsWaitingImports.Tables("Imports")
sqlConn.Close()
End Sub

for the update I have tried:
If Not dsWaitingImports.Tables("tblImport_Spec").GetChang es Is Nothing Then
sqlDAP.Update(dsWaitingImports.Tables("Imports").G etChanges)
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