Livezilla is unbelievably good. I searched for an app like this for years, meaning easy to install myself, integrated with my wordpress site, text AND video chat and I can even integreate it with my payment...
When trying to upload my server using FTP I receive "permission denied (550)".
It's likely that you are trying to upload the LiveZilla Server files into a folder outside of your public internet directory. Use the Select button to determine the proper place for your installation.
Furthermore, it's possible that your FTP server does not comply with the FTP standard RFC959. This would require you to extract the files of the LiveZilla Server onto your local computer in order to upload them manually using a common FTP client. Further information regarding the manual upload can be found here.