IVR not receive input

I’ve created a simple ivr with background() function but when audio playing asterisk didn’t receive any input. Could you suggest any solution?

enable DTMF Logging in your /etc/asterisk/logger.conf

I’ve enabled dtmf in logger by dtmf => dtmf But there are only these lines in the log:

[quote][2015-08-01 07:13:23] Asterisk 11.13.0 built by palosanto @ rpmbuild64-2.elastix.palosanto.com on a x86_64 running Linux on 2014-10-04 01:12:50 UTC
[2015-08-01 07:27:11] Asterisk 11.13.0 built by palosanto @ rpmbuild64-2.elastix.palosanto.com on a x86_64 running Linux on 2014-10-04 01:12:50 UTC[/quote]

Channel type?

DTMF options on that channel? Does it match what the other side is doing?

Codecs (most codecs are incompatible with inband DTMF).