Shoutbox

i have a problem with  icon changing, because i can't change a sharing folder icon in the contact list window and the conversation window.
I use a WLM9, and maybe the 2 icon ID is this:
Contact List Window: Id="978"
Conversation Window: Id="1444"

I write a link in the S.I.xml:

<Replace>
   <Graphics>
       <Pictures>
   <Picture Id="978"><File>images/978.png</File></Picture>
   <Picture Id="1444"><File>images/1444.png</File></Picture>
       </Pictures>
   </Graphics>
</Replace>

What is the problem with this?