I guys,
Thanks again for the help...
Well, since I don't wont to use the tiny_mce, I will use from now on the </br> to create my line breaks.
Still, is funny that I was using normal line feeds without using the tiny_mce and this is not the correct way of doing it, but was indeed working. :-)
Ok, the solution is clear for me (and the way of using it as well, indeed is quite logic what you explained to me), everything is working with html tags, thanks very much guys, you rock!!!!
Cheers!