I am having trouble getting the Site.com Tab to show up in my salesforce toolbar.  I have followed the directions for the following help link and still can't get it to show up.  I opened a case with salesforce help and they said it was a developer issue and couldn't help.  Does anyone know how to troubleshoot getting the Site.com tab to show.  

Here is the link to the help overview that I have followed : https://help.salesforce.com/apex/HTViewHelpDoc?id=siteforce_hometab.htm&language=en_US