I've been searching at google and here and I really didn't find out why it happens.
with all other tools it works perfectly but not with the bezier.
I want to know if it's some kind of bug or is configuration problem.
The thing is, I put in bezier configuration "last style used" and when I'm going to use it's all without stroke or fill, or with other colors which wasn't the "last style I used". I have to put it manually every time i use it and it's very annoying. Even with ctrl/shift +color.
Sorry if there's another topic with the same question, I really have tried to find out the answer but I didn't find it anywhere.

thank you

Welcome to InkscapeForum!

No, I don't think there is another topic about this. And I'm going to need some more info, to understand what you mean. Could you say step by step what you do, and where it goes wrong, and how it goes wrong (not just "doesn't work"). I'm not sure if a screenshot could be made to illustrate this or not. Probably not, based on what I'm thinking. But I'm just not clear what's happening.

Uummm....ok, the Pen/Bezier tool can't pick up the style last used by another tool....I don't think.... Is that what's happening?

It don't pick up the last style used by another tool, even the bezier/pen itself.
mainly the width. I did put there 0.2 px and when I used the tool again, it came back with 1px
with different colors.
I even reinstalled inkscape to try to fix it.
I don't know what's happening but I've deleted the settings file and now seems to be working.
anyhow, thanks. I still don't know the problem, but at least it works now.