Hello again people:
I did find my error (or may be script error?).
Look at the file includes/annotate.php of the mod, line 74...
$ann_vars = array ("'%D'", "'%T'", "'%N'", "'%H'", "'%U'", "'%S'", "'%B'");
Do you see something strange?. Yep... double AND simple quotes. So the array was being filled with the '%X' string (all the text between the double quotes) instead of being filled with the expected string (or at least what I was expecting).
So you have two options: using the variables inside the simple quotes on the options page of the annotate (in case that you will use %<any of the posible letters used> just as srting), or simply editing this line and remove the simple quotes, so it looks like this:
$ann_vars = array ("%D", "%T", "%N", "%H", "%U", "%S", "%B");
Thanks for this excellent mod, it is just what I need.
Best regards.
WR.