Avk, it is offtopic but I think your signup form (which asks for credit card number) might scare a normal user into believing that his data is not safe. The browser says that HTTPs page contains some unauthentic elements + the fields where you ask for card information do little to build confidence.

Asking for credit card information is a huge thing and either show in the form that you are concerned about security or better still use an external trusted vendor such as PayPal or Authorize.net