do you have any other extensions installed? what versions?
sometimes, you need to restart the computer after deleting the cache file and then delete it again, have you tried that?
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.