system.net.mail MailMessage declaration problem, also how to attach files

every time I declare a new MailMessage the page won't load, not matter what I've tried, I get a runtime error at every point, and there doesn't seem to be alot of help online for the system.net.mail class

my code so far, I haven't had the chance to test it as even the declaration causes a runtime error

all I need is the easiest way to send text and some pictures from an online form, if there is an easier way to do this that'd bef fine

sending just text through Dim objMailer As New System.Net.Mail.SmtpClient() works just fine, it's MailMessage that has problems for some reason.

my code bellow

      Public Sub SendEmail(ByVal emailFrom As String, ByVal emailTo As String, ByVal emailSubject As String, ByVal emailBody As String)
          Dim objMailer As New System.Net.Mail.SmtpClient()
          Dim senMail As New System.Net.Mail.MailMessage()

          objMailer.Host = 'myrelayserv.com'      ' Your SMTP server
          objMailer.Send(emailFrom, emailTo, emailSubject, emailBody)
      End Sub

the rest of my code, right now it's all in comments as I can't get the mailmessage issue resolved, if you notice any problems in it please do let me know

      Sub Submit_Form(ByVal Sender As Object, ByVal E As EventArgs)
          'SendEmail(Me.email.Text, 'mail@school.edu', Me.name.Text, Me.ideas.Text)

          'create the mail message
          Dim senMail As New System.Net.Mail.MailMessage
         
          'set the addresses  
          senMail.From = New MailAddress(Me.email.Text)
          senMail.To.Add('mail@school.edu')

          'set the content
          senMail.Subject = Me.name.Text
          senMail.Body = Me.ideas.Text

          'add an attachment from the filesystem
          senMail.Attachments.Add(New Attachment(FileUpload1.PostedFile.FileName))

          ''to add additional attachments, simply call .Add(...) again
          ''mail.Attachments.Add(New Attachment('c:\temp\example2.txt'))
          ''mail.Attachments.Add(New Attachment('c:\temp\example3.txt'))

          ''send the message
          Dim smtp As New SmtpClient('myrelayserv.edu')
          smtp.Send(senMail)
         
      End Sub