problems updating from gridview's textbox

This is rather urgent and at an end as to diagnosing what is keeping me from updating a gridview even though I can reliably read my data.... it is a simple two-field gridview with only one field that I update (SQL Server database)... does anyone see any obvious problems? Thanks in advance for any help!... Brock:
DATA ACCESS CLASS: Imports Microsoft.VisualBasic Imports System.Data Imports System.Data.SqlClient Imports System.Web.Caching Imports System.Drawing Public Class PAC2000DataAccess Public Sub New() End Sub Public Shared Function QueryChangeRequests() As DataTable Dim dtResult As New DataTable Dim sqlstatement As String = "" Dim Selector As String = "" sqlstatement = "SELECT * FROM [AppTools].[dbo].[tbl_pac2k_remarks]" Using sqlcon As New SqlConnection(ConfigurationManager.ConnectionStrings("PAC2000Connection").ToString) ...