smtp host was not specified - but still works

Hi, 
   I'm trying to implement the PasswordRecovery tool. However, since I want to use a secure SSL connection (Gmail), I've created my own SMTP client. The app seems to be working fine, and when I click on submit, I get an email sent to me with the new password. However, I get a "Server Error in '/' Application." page with "System.InvalidOperationException: The SMTP host was not specified." being the error message. I've got "smtpClient.host = "smtp.gmail.com" " in the code, but the error still appears, even though I recieve the email in my gmail account. Is there a reason this is happening? I tried writing the details to the web.config file, but that doesn't work as it needs an SSL connection. Any ideas on what to do?
Thanks