On line material library 0.6 error

I installed the add on “online material library” (http://peter.cassett…terial-library/) but unfortunately I can’t get it to work, and every time I try to load a material gives me the error that you see in the image.

Someone would know advise me how to solve the problem?
I use Blender 2.68a 64bit on Windows 8 64bit


Please use the appropriate support forum for support questions.
Moved from Blender Discussion to Support / Python

Also please read http://blenderartists.org/forum/faq.php
Please wait for your post to be approved by a moderator before reposting

it probably needs an update


Sorry for my error.
And than’s for the answer.