Redirecting Web Page in ASP.net

I am having a problem redirecting a web page to another web page in ASP.net. I want a password page to redirect the web page to emails.aspx. It keeps on redirecting to default.aspx. How do I solve this problem?

Here's my code:

     If UserIsValid(strUserName, strPassword) Then
  
       'Response.Redirect("emails.aspx") - didn't work

                 FormsAuthentication.RedirectFromLoginPage("emails.aspx", False)

        Else

                 lblOutput.Text = "Invalid login"

        End If