Problem sending HTML mail

Hi ,

I installed HTML mail module and tried to send a HTML mail using the send test mail options. All i got a plain or normal mail.
I have smtp and mime module installed . I used $headers["Content-Type"] = "text/html; charset='utf-8';"; as a header just before the drupal_mail function get called in the HTML mail module. Even if it is showing the content type header as "text/html" i m not getting a HTML formatted mail.

Any clue ?