renderman error

Hello i try to use renderman on window7 with belender 275 -a official

and a message of error says.

were is the problem?

http://i1207.photobucket.com/albums/bb472/cromos1/p.jpg

The error message says “No module named ‘prman’”…
You did install renderman before trying to activate the plugin, didn’t you? The plugin is just an exporter, you will still need to install the actual renderer…