Table heading bug?

Hi,
I'm using CI 3.1.7, and trying to use properly the table library.
I am executing a request (typically a SELECT *), and use this line to output HTML :

PHP Code:

echo $this->table->generate($textes_last); 


It successfully prints a HTML tab, with my data, by the heading row is the first set of data, and not the column titles as I expect, and as the documentation describe it.

How can I use this library without having to use "set_heading()" manually ?

Thanks a lot for your help !