If you cant change the permissions using a 3rd party FTP program like File Zilla, you will need to contact the host to have them change the permissions for you.
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.