No, I dont have to remane anything. My robots.txt is correct.

I will try to explain again better:

Joomla Developers says:

# If the Joomla site is installed within a folder
eg www.example.com/joomla/ then the robots.txt file
# MUST be moved to the site root
# eg www.example.com/robots.txt
# AND the joomla folder name MUST be prefixed to all of the
# paths.
# eg the Disallow rule for the /administrator/ folder MUST
# be changed to read
# Disallow: /joomla/administrator/

So, as joomla developers say, my robots.txt is in the site root: www.example.com/robots.txt

But Jsitemaps looks for it in the joomla folder: www.example.com/joomla/

So, it seems to be a Jsitemap bug, no?