Sending Mail in .Net 2005

Below is the code i have been using to send mail in .Net 2003 for a while now quite successfully. I have upgraded to .Net 2005 and this no longer works. Can anybody help me with the changes that are needed to make this workable in 2005.

Thanks in advance.


Imports System.IO
Imports System.Web.Mail


 Function GetEmailBody(ByVal strFileName As String) As String
        Dim srTemplate As StreamReader
        srTemplate = File.OpenText(Server.MapPath(strFileName))
        GetEmailBody = srTemplate.ReadToEnd
        srTemplate.Close()
    End Function

    Private Sub SendEmail(ByVal strTo As String, ByVal strBody As String)
        Dim myMessage As New MailMessage
        Dim myMail As SmtpMail

        myMessage.BodyFormat = MailFormat.Html
        myMessage.From = "admin@domain.com"
        myMessage.To = strTo
        myMessage.Subject = "email subject"
        myMessage.Body = strBody

        myMail.SmtpServer = "relay-hosting.secureserver.net"
        myMail.Send(myMessage)
    End Sub

Private Sub btnEmail_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles btnEmail.Click
              Dim strEmailBody As String = GetEmailBody("email.html")
              strEmailBody = strEmailBody.Replace("##Address##", Session("Email"))
              SendEmail(Session("Email"), strEmailBody)
 End Sub