My question is what link should I use to enable a 1 click share on facebook of a webpage from an external application such as an email?

Thanks

Here are the details:

User submits content to my website. Content is first reviewed by webmaster Webmaster sends out congratulations email, "Your article has been published, here is the link: http://www.mywebsite.com/new-page.html"

I would like to include in the congratulations email, "Click on this link to share your article with your friends on facebook" The link I am using is the following: http://www.facebook.com/share.php?u=http://www.mywebsite.com/new-page.html

If I paste it into the address bar and I am logged in it works fine and facebook parses the new page for meta data and displays Page title and description. However, when clicking on the link from my newsletter, I am redirected to the login page, even though I am logged in, and after logging in, I am sent to my profile page and the share is not posted.