AGI command "SAY DIGITS" not working

I’ve got a new * up and running and am having some problems with AGI. I am using php for my agi scripts. The test scripts worked fine, but I have not been able to get the command “SAY DIGITS” to work properly. “SAY NUMBER” works fine. Is a difference in the syntax of these two commands? Thanks in advance for your help.

Are you using a PHP library? Such as Or have you rolled your own? For me the SayDigits works fine, I am on Asterisk 1.2beta and the latest 2.x of PHPAGI.