Sidebar Widgets – Option button issue

Hello,

I try to access the option feature to a widget on Administration>Presentation>Sidebar Widgets config page, exactly clicking on the option icon of the widget, it shows a non editable, ajax option dialog box, that should be normally editable, but actually isn’t. The same is for each widget. I guessed it is a permission issue, but chmod the widget to 777, but still no edit available.
Does anyone know about this issue?

Thanks,
Alex