Just found this post Im on the same host Heart Internet and it does not work for me either.
Never had a problem with any solution or extension in the past with this host always been very good.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.