access denied on http://www.w3.org/2006/03/wn/wn20/schema/

Dear webmaster,

I noticed that I get an access denied error [1] on the page http://www.w3.org/2006/03/wn/wn20/schema/

I understand your delay policy on popular DTDs and schemas, so I  
expected a delay, not an access denied error.
Is this access error also part of that policy? If yes, what do you  
recommend people that need the schema file?

Thanks for any insights,

Jacco van Ossenbruggen

[1] "Sorry, Insufficient Access Privileges"