[oracle forms 10G] display of icons

Hello everyone,

I am a beginner with Oracle Forms, and I am trying to display icons on buttons but I cannot do it.
I proceeded as follows:
In the orion-web.xml file, I added the line:
<virtual-directory virtual-path="/forms/icons" real-path="C:\icons" />

In the forms.conf file, I added:
AliasMatch ^/forms/icons/(..*) "C:\icons/$1"

I set the Icon property to Yes
I wrote the file name

Thank you for your help.

Configuration: Windows XP Internet Explorer 7.0