Can somebody help me figure out how to add a facebook like box.  I use a soho admin template.  Facebook gives a plugin code, but I can't figure out to add it onto the page.  There is nothing on my admin page that allows me to add a plugin.  The tutorial shows a plugin tab, but my actual edit page does not have one.  There is a block that says "click to show plugins" but there is nothing there.  I tried the tab for a custom code, but that didn't work.

Help!!

Thanks!