Share facebook button with iframe

I'm having a HUGE issue I go to the developers page click on share button for facebook, click the one I like put in my web address and click get code, copy all of code paste it into my HTML and then do a preview and it always says the file or directory can't be found? I have not published my page yet and read someone that it doesn't need to be published to view the share button as it should show up so I can properly place it where I want it on my page. This is causing a great deal of frustration can someone assist please? The software I am using to build my web page is web easy professional 10 and there support team suggested that I get the Iframe code as it works with this program. How ever I've got that code but yeah nothing is working so not sure what I'm doing wrong if anything?