FAILED status in Elastix Reports

In your output, there is an error from the format_wav.c module saying the input is not a wav file. Check your format and make sure that you're saving it in the format Asterisk expects.

As a workaround, you can use the open source audio tool "sox" to make things a little easier: sox /var/lib/asterisk/sounds/custom/Untitled24.wav -r 8000 -c 1 /var/lib/asterisk/sounds/custom/Untitled24.gsm resample -ql

This will create a GSM format of the file and should cause your extension logic to work properly.

Have you looked at the Asterisk console at load to see if there are errors in mysql channel driver? Look at the mysql server logs as well so see if there are connection or authentication issues.