Rogerio,I don't speak/read Portugues, but due to my Spanish I do understand a bit, I know you are discussing this with Ivan, but if you post a small sample where the problem could be duplicated, this could be resolved in not time and possible included in the upcoming release of 1.6.6.
I need to use the IP control in one of my projects, but I have not started with that form yet, so I am not able to test/duplicate your findings.