Error: object reference not set to an instance of an object [Resolved]

Hi please help & save my time:

I am getting an Error: object reference not set to an instance of an object

Here is the code:
note: codeTextBox.Text= CBE10000001

I am getting the error while calling the function LoadBusinessManDetails:
(Its not even going to that function. just throw the error exactly on the following line)
CALL mSybergy.LoadBusinessManDetails(CodeTextBox.Text)


my function is:

Public Function LoadBusinessManDetails(ByVal vCode As String) As DataSet
        Dim cmd As MySqlCommand = Nothing
        Dim adp As MySqlDataAdapter = Nothing
        Dim ds As New DataSet
        Try
            connection()
            cmd = New MySqlCommand("SP_SelectWorker", Con)
            cmd.CommandType = CommandType.StoredProcedure
            cmd.Parameters.Add("vWMC", MySqlDbType.String).Value = vCode
            adp = New MySqlDataAdapter(cmd)
            adp.Fill(ds)
            Con.Close()
            Return ds
        Catch ex As Exception
            Throw ex
        Finally
            If Con.State = ConnectionState.Open Then
                Con.Close()
            End If
            cmd.Dispose() : adp.Dispose()
        End Try

    End Function

please help me to save my time.
regards,
thiru.

[Resolved]