Front page extensions have a lot of security vulnerabilities. Because of this, Microsoft itself had stopped supporting the product. Every patches for the applications was enabled to stop the vulnerabilities, but as the vendors itself is stopping the support for the product, it is a bad idea to have this installed in a shared environment which is used by hundreds of other customers.
So, we have planned to stop the product support in our new servers.
Microsoft announced this in June 2006. You can refer to some related forums here.
So, you will have to switch to some other site builders for designing your site. If you have the files in your local system, then you can use any FTP clients like Filezilla, Cute FTP etc to upload the contents to the web. Also, we are offering free and paid site builders for designing and uploading the site.