.NET PROBLEM, UPDATE OF TABLE NOT HAPPENING

I am trying to update a row in a table used to track passwords & usernames.  I'm getting no error and no rows updated.

The table is like this:

username varchar
pw varchar
restid smallint

I can "Log in" , select the right row from the table, using this code:

 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim cmd As System.Data.OleDb.OleDbCommand = DBTheBusiness.CreateCommand
        Dim cmdUpdate As System.Data.OleDb.OleDbCommand = DBTheBusiness.CreateCommand

        Dim nrows As Integer

        cmd.CommandText = "select restid from uservalidate "
        cmd.CommandText = cmd.CommandText & "where username = @username and "
        cmd.CommandText = cmd.CommandText & "PW = @pw and "
        cmd.CommandText = cmd.CommandText & "restid = @restid"

        Dim adapt As New System.Data.OleDb.OleDbDataAdapter(cmd.CommandText, DBTheBusiness)
        Dim username As System.Data.OleDb.OleDbParameter = cmd.Parameters.Add("@username", SqlDbType.VarChar)
        Dim pw As System.Data.OleDb.OleDbParameter = cmd.Parameters.Add("@pw", SqlDbType.VarChar)
        Dim restid As System.Data.OleDb.OleDbParameter = cmd.Parameters.Add("@restid", SqlDbType.Int)

        username.Value = (txtUser.Text)
        pw.Value = (TxtPW.Text)
        restid.Value = CInt(txtRestId.Text)

        DBTheBusiness.Open()
        nrows = cmd.ExecuteScalar
        lblhide.Text = CStr(nrows)
        DBTheBusiness.Close()
        If nrows = 0 Then
            lblnotconnected.Text = "Invalid login.  Correct and try again"
            Exit Sub
        End If

        txtChgUN.Enabled = True
        txtChgUN.BackColor = System.Drawing.Color.White
        txtChgPW1.Enabled = True
        txtChgPW1.BackColor = System.Drawing.Color.White
        txtChgPW2.Enabled = True
        txtChgPW2.BackColor = System.Drawing.Color.White
        BtnChgPW.Enabled = True
    End Sub

But I can't update using this:

Private Sub BtnChgPW_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnChgPW.Click

        If Trim(txtChgUN.Text) = "" Then
            lblnotconnected.Text = "User Name cannot be blank"
            Exit Sub
        End If

        If Len(Trim(txtChgUN.Text)) < 8 Then
            lblnotconnected.Text = "User name length must be between 8 & 15 Characters"
            Exit Sub
        End If

        If Len(Trim(txtChgPW1.Text)) < 6 Then
            lblnotconnected.Text = "Password length must be between 6 & 8 Characters"
            Exit Sub
        End If

        If Trim(txtChgPW1.Text) <> Trim(txtChgPW2.Text) Then
            lblnotconnected.Text = "Password & Confirmed Password are not the same. Please re-enter them"
            Exit Sub
        End If

        lblnotconnected.Text = "Changing User Name & Password to " & txtChgPW2.Text
        Dim cmd As System.Data.OleDb.OleDbCommand = DBTheBusiness.CreateCommand

        Dim username As System.Data.OleDb.OleDbParameter = cmd.Parameters.Add("@username", SqlDbType.VarChar)
        Dim pw As System.Data.OleDb.OleDbParameter = cmd.Parameters.Add("@pw", SqlDbType.VarChar)
        Dim restid As System.Data.OleDb.OleDbParameter = cmd.Parameters.Add("@restid", SqlDbType.Int)


        pw.Value = txtChgPW1.Text
        username.Value = txtChgUN.Text
        restid.Value = CInt(lblhide.Text)

        lblnotconnected.Text = CStr(restid.Value) & " " & username.Value & " " & pw.Value


        DBTheBusiness.Open()
        cmd.CommandText = "update uservalidate set username = @username, "
        cmd.CommandText = cmd.CommandText & " pw = @pw "
        cmd.CommandText = cmd.CommandText & " where username = @username"
        cmd.CommandText = cmd.CommandText & " and pw = @pw "
        cmd.CommandText = cmd.CommandText & " and restid = @restid ; "

        lblnotconnected.Text = cmd.ExecuteNonQuery() & " Executed " & Chr(13) & CStr(restid.Value) & " " & username.Value & " " & pw.Value
        DBTheBusiness.Close()
    End Sub





lblconnected shows this:

 0 Executed 1 john sayre asdfgh

Zero rows executed
restid (the paramater) = 1   - Correct
username (parameter)           correct
pw        (parameter)          correct


What am I missing?