Hi RHurtado
In your Robust.ini in section [GridInfoService] there must be set:
economy = http://url-to-your-joomla/components/com_opensim/
Of course pls replace "url-to-your-joomla" with the correct value. Important is the trailing slash! After changing this value, an update in the grid settings of viewers is required.
I got reported, that some phoenix viewers refuse to take these changes. So far in my experience, Singularity Viewer has been the most reliable one concerning this issue.
Greetz
FoTo50