Hi Guys,

I changed the contrast value and guess what....

It is working ! ! !

thank you Alexandros and Stu

soon I will try a color display, and if I get it working fine I will let you know here in the forum

Just one more thiing : Have you ever faced problems with Pic's in a protoboard ?

I just can not make it working. It seems to have some parasite capacitancce between the holes.
I had to move the project to a experimental PCB and make all the soldering.

Thank you again

Sérgio Pinheiro