Modem Not Working In G4 Powerbook

[davidf2002]

I'm having the same problem with the modem on my G4 powerbook as described here:
http://www.macosx.com/content/faq.php/q2887/Powerbook-Modem-Not-Working--Tiger.html

I have the 10.4.1 update also, still no go.
Is there any fix for this yet?

thanks
Dave.