I can't update my database...help!

[siomai]

hi everyone! I'm having trouble with my update button...
What my program does is it lets the user input and save new customer record/s and edits/updates the saved records (this is my problem) my main problem is that it doesn't update my database. There are no errors popping up in my system that would tell me why.

Secondly, I made a search button so that when the customer list becomes longer, it would be easier for the user to look for a customer record. When the search button is clicked, the search form will appear and the selected record will be placed in the main form. The problem now is it copies only the customerID and not the whole record to my main form. Please please help me! I still can't program that well and will be needing so much of your help. Thanks a lot!

Here's my code...

Imports ExpertSearch
Public Class Form3
Inherits System.Windows.Forms.Form

**I bind and created my connection,adapter and dataset using the wizard**

Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Try
daCust1.Fill(DsCust1)
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.OKOnly, "Error")
End Try
End Sub

Private Sub btnSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSave.Click
Dim dr As DataRow
Dim drcustcmd As New System.Data.OleDb.OleDbCommandBuilder(daCust1)
daCust1.MissingSchemaAction = MissingSchemaAction.AddWithKey
Try
'dsCust.Clear()
'daCust.Fill(dsCust, "Customername")
dr = DsCust1.Tables("Customername").NewRow
dr("CustomerID") = txtCustID.Text
dr("Customername") = txtCustName.Text
dr("Address") = txtCustAdd.Text
dr("Tel") = txtCustTel.Text
dr("Fax") = txtCustFax.Text
dr("Attention") = txtCustAtt.Text
DsCust1.Tables("Customername").Rows.Add(dr)
daCust1.Update(DsCust1, "Customername")
MsgBox("Customer record saved", MsgBoxStyle.OKOnly)
Catch ex As Exception
MsgBox(ex.Message, MsgBoxStyle.OKOnly, "Error")
End Try
End Sub

Private Sub btnUpdate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnUpdate.Click
daCust1.Update(DsCust1, "Customername")
End Sub

Private Sub btnsearch_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnsearch.Click
Dim mExpertSearch As New ExpertSearch()
If mExpertSearch.Execute("Select * from CustomerName", cn1, 0) = True Then
txtCustID.Text = mExpertSearch.FieldValue
End If
cn1.Close()
End Sub

This is the code I got from the net for the search...(I placed it in a class)

Imports System.Windows.Forms
Imports System.Data.OleDb
Imports System.Data.SqlClient

Public Class ExpertSearch
Private mFieldValue As String
ReadOnly Property FieldValue() As String
Get
Return mFieldValue
End Get
End Property
Function Execute(ByVal SQL As String, ByVal DBConnection As OleDbConnection, ByVal ColumnNumberToRetrive As Integer) As Boolean
Dim ds As New DataSet()
Dim da As New OleDbDataAdapter(SQL, DBConnection)
da.Fill(ds, "Table")
Dim frmSearchForm As New Customer()
frmSearchForm.mColNumber = ColumnNumberToRetrive
frmSearchForm.mDS = ds
ds = Nothing
da = Nothing
frmSearchForm.ShowDialog()
If frmSearchForm.DialogResult = DialogResult.OK Then
mFieldValue = frmSearchForm.ReturnValue
Execute = True
Else
Execute = False
End If
End Function
Function Execute(ByVal SQL As String, ByVal DBConnection As SqlConnection, ByVal ColumnNumberToRetrive As Integer) As Boolean
Dim ds As New DataSet()
Dim da As New SqlDataAdapter(SQL, DBConnection)
da.Fill(ds, "Table")
Dim frmSearchForm As New Customer()
frmSearchForm.mColNumber = ColumnNumberToRetrive
frmSearchForm.mDS = ds
ds = Nothing
da = Nothing
frmSearchForm.ShowDialog()
If frmSearchForm.DialogResult = DialogResult.OK Then
mFieldValue = frmSearchForm.ReturnValue
Execute = True
Else
Execute = False
End If
End Function

End Class

I'm hoping for your pieces of advice!