[asterisk-users] IVR response of the pound key

[sipxuser sipx]

Dear all,

I've used trixbox to compose a custom IVR, and I've defined the input
of pound key(#) leading to the repetition of the parent announcement.
But each time the pound key is pressed, file "dir-intro.gsm" will
always be played. Can any one tell me the reason?
By the way,if I want to modify the build-in IVR, which configuration
file should be edited? Thanks in advance.

Best Regards,
Michael H.