Two ScrolledWindows in a vbox problem

[angelo dureghello <_asm libero it>]

Hi all,

i'm getting trouble packing 2 scrolledwindows in a vbox, if i connect 
the on_size_allocate  of both the scrolledwindows, the scroll work but i 
can't see the scrolling bars, there is a grey shape for those but they 
are not visible at all.

Probably i'm wrong to connect the Scrolledwindow signals, should i 
connect the VBox signals instade ? But the Vbox is just one, so i d'ont 
know how to go on this.
If someone can helpme ,

Infinite thanks, angelo