Click Events for Image Button

Help! I am relatively new to ASP.NET programming, specifically to using Visual Studio .NET. I am attempting to have the click event of an ImageButton do two things... Firstly, I want an email sent using the contents of textboxes on the page. Secondly, I want the user to be directed to a new web page. I have done this successfully before, however I was building the HTML using FrontPage, then opening the file in a text editor and adding the ASP.NET code. Now, I'm using VS .NET and am trying to implement the Codebehind module that opens up when you double-click the ImageButton. The code I am using is:




Private Sub btnSubmit_Click(ByVal sender As System.Object, ByVal e As System.Web.UI.ImageClickEventArgs) Handles btnSubmit.Click


If Page.IsValid Then


Dim mailMessage As System.Web.Mail.MailMessage = New System.Web.Mail.MailMessage


mailMessage.From = "[email protected]"


mailMessage.To = "[email protected]"


mailMessage.Subject = "Request"


mailMessage.BodyFormat = System.Web.Mail.MailFormat.Html


mailMessage.Body = "text to appear in the body of the email message"


' Code for the body has been snipped out for length purposes


System.Web.Mail.SmtpMail.SmtpServer = "localhost"


System.Web.Mail.SmtpMail.Send(mailMessage)


Response.Redirect("ask_expert_response.aspx")


End If


End Sub


When I click the ImageButton, the page just posts back to the server, and neither sends an email, nor redirects to a new page. Can anybody tell me where I might have gone wrong? Is there anything else I need to be doing? Thanks in advance!