ExpressJS app generator not recognizing its flags

I can't run the express app generator with flags.
See example below. I run express --version and it interpretes the --version part as a target directory and creates the app there. In Windows XP SP3.
Am I doing something wrong? My knowledge is really very limited.

X:\server>node --version
v0.8.6   

X:\server>express --version

   create : .
   create : ./package.json
   create : ./app.js
   create : ./public
   create : ./public/javascripts
   create : ./public/images
   create : ./public/stylesheets
   create : ./public/stylesheets/style.css
   create : ./routes
   create : ./routes/index.js
   create : ./routes/user.js
   create : ./views
   create : ./views/layout.jade
   create : ./views/index.jade 

   install dependencies:
     $ cd . && npm install

   run the app:
     $ node app

X:\server\--version>