gtkbuilder and spinbutton

[ROBERTO FORTUNATO <rfortunato sisma com>]

I use Glade 3 to create my interface. I have a problem with gtkspinbutton 
and gtkbuilder: gtkspinbutton  accepts step_increment, page_increment, 
lower, upper but not the default value.
Here an example of glade file:

  <object class="GtkAdjustment" id="adjustment220">
    <property name="value">100</property>
    <property name="lower">0.1</property>
    <property name="upper">1000</property>
    <property name="step_increment">0.1</property>
    <property name="page_increment">10</property>
  </object>


Can someone help me?

Thanks in advance

Roberto Fortunato