Reporting services - pdf export problem with font

Hello.

I'm using Reporting services 2005 for a project, and have a problem with pdf export.
One of my reports uses a bar code font to display some info. The bar code font is installed both on the server and on my computer.
When I display the report in the report manager or export it in excel, everything is fine. But when I export to pdf, the "wannabee bar code" is displayed as text instead of with the font !

Is there a way to get the pdf exporter to use the font ?

Thanks in advance
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Laetitia