Board Thread:Support Requests - Getting Technical/@comment-4620155-20130408065412

The wiki I edit at has the Template:Unsigned, with the coding as follows:

—Preceding unsigned comment added by User: (talk • contribs) Remember to sign your posts with ~


 * It should be used when Users do not sign their posts in talk pages.
 * Its usage is username where "username" is the name of the user who did not sign their post.

I want the template to automatically appear in Forum pages when a person does not sign their comment, but I don't know how. Help please? 