As I said that was the appropriate page for my test site, but may be different depending on how your site is configured. Please make sure this is the right file and that you're overriding it correctly by adding other test text on the page. If that shows up properly, but the JFBCLogin tag does not, then we can go from there.
Also, please note that if you have set a Social Tag Render Key in the JFBConnect > Social > Misc section, then you will need to add it to the login tag. For example,
{JFBCLogin key=1234}
-Melissa