If you want a floating share bar, like we have in the bottom corner of every page on this site, I'd recommend the JFBCSocialShare module. It has a setting to make it 'float', and you can make it hover in any corner. We have a little extra CSS on this site, that we'll be including in JFBConnect in the future. I can gladly get that to you know if you'd like to test it.
In the JFBCSocialShare, you can leave the URL/Href parameter blank so that the buttons are always for the current page.
As for the {JFBCLike href=...} tag, make sure you've set a full URL, including http://. Beyond that, if it doesn't work, let me know a page you're trying to use it and it's not working.
Thanks,
Alex