URL Protection Addon not working with sub-directory URL ?

Hi,

I cannot find any instructions for using this addon to check if I am using it correctly. The URL points to a sub directory of the primary MULTISITE (metsfitness.com).

Please see the following snapshot..
http://snag.gy/bL4Xv.jpg

Please advise how I can protect files within a sub-directory of a WP MULTISITE?

Thanks,