asterisk users - Mar 2009 - Callerid charset problems

Hi,

I'm having problems when the callerid of a user defined in the
sip.conf contains special characters such as: ?, ?, ?, ?, ? , etc. The
strange thing is that these characters are displayed correctly in the
dialplan  by using the sip show peer command, but if this user makes a
call, these characters are not displayed correcly in the SIP message.

Any ideas of what might be happening?

Thank you in advance.

Regards,

Santi