Are you sure you want the "www." at the beginning of your URL? Not only is it unnecessary, it may be part of why you're having problems.
To install a Shaper, all you need to do is extract the shaper .zip file, upload it to the location on your server where you intend to have the site located (I recommend FileZilla
for FTP; just make sure the transfer mode is set to "binary", or files could get corrupted on a slower connection), and navigate to the location of the site to go through the install process. (NOTE: you will need to already have a blank database created - the installer will ask for the database access details)
There is a more detailed tutorial on the Wordpress FAQ
, including an additional tutorial that can be followed if you want to simplify the process a little by using an auto-installer provided by your host (Fantastico and Softaculous are the most frequent options).