Ok, here is the lss to try to fing the solution to my first question.

Thanks to all for the help.

Ok, well, I continue to making my own tests, and I get the conclusion that the problem is not theregex validation, that works fine, the problem is on the moment to show/hide a subquestion, even if the subquestion is hide, the validation keeps working, and that dont let you continue with the survey.

Any idea to fix this?

Thanks for the help

OMG, finally I get done to fix this, I just have to add the .NAOK, I didnt see it before, now works good.

Thanks for the help to all.