You'll need to do things a little differently there because that Join Community comes in a popup which doesn't process Joomla plugins first (which replace the {JFBCLogin} text.
There's 2 options. The easiest is to put in a custom link. To do so, simply add the following link in the code, depending on what you'd like the link to look like:
Image - Here, you'll need your own image, but you can simply crop an image of the standard Login With Facebook button, if you want:
<a href="javascript:void(0)" onclick="jfbc.login.login_custom();"><img src="http://yoursite.com/linktoimage.jpg" /></a>
<a href="javascript:void(0)" onclick="jfbc.login.login_custom();">LINK TEXT</a>
<input type="button" onclick="jfbc.login.login_custom();" value="BUTTON TEXT" />
Let me know if any of those don't work for you, for some reason, and we can probably help you get the normal Login With Facebook button working. It will take more work though, and hopefully isn't necessary.
Finally, I didn't include the PHP tags above (<?php ... ?>). They shouldn't be necessary when you're editing the template file, but, of course, if it fails, use them!
Thanks,
Alex
Adding the facebook connect login to the 'join community' popup
