Access vocabulary data exports - Anonymous access denied

Hello,

First of all thanks for this module it seems to work well to build an easy taxonomy server with feeds. However, I need to access the generated XML taxonomy export without being logged. Great, there is a permission for that (People > Permissions > Taxonomy Server > "Access vocabulary data exports") but I can't get it to work for the ANONYMOUS USER. After a few attempts on different websites, I always have the "Access denied" error. Does someone got this problem also ?

Is there something else to configure to access URLs like http://localhost/site1/taxonomy/vocabulary/tags/xml ?

Thanks for your help.

Best regards.
RB