Thanks for your replay.

I have been in some other projects and I´m back to this problem.

I think That is a Tab Issue. I have a localize strategy that searchs all controls when loading and changes the content or header of each control. It only works for the first Tab.

I don´t know if anybody else is aware of this problem.

The binding that I use is correct so it works if the control is in the first Tab or in a window without Tabs. Is a UserControl with an Image Control and a DependencyProperty that is bound as usual to a field in my Database. Each time the value of the property changes, the control searchs the image field and sets the Source of the Image.

The UpdateLayout() method after the Source is Set doesn´t work if the control is inside a Tab.

Is it a bug?

Thanks again.