Cause for one, you seemed like a new member joined just so that you can put advert of your website.
Second, I don't know how secure your website is. You can promote your website on FB, in groups or similar social networking site.
If you want to promote here, you can keep it in your signature and make meaningful posts in the forum, so that your posts in return will advertise your website.
Or, make a meaningful and descriptive posts in first post, so that members here know what to expect before they decide to open your site.