How to add IVR audio file in dialpans in Asterisk

I am novice asterisk player who is trying to add IVR audio file in the asterisk Dialplan.I tried to add already present audio file named marryme in the dialplan but its giving error as

File marryme does not exist in any format

Anyways ,i have to use my custom ivr audio file but i dont know how to add this.Here is my dialplans…

exten => 2001,1,Answer()
exten => 2001,2,Background(marryme)
exten => 2001,3,Hangup()

exten => 1,1,Playback(thank-you-cooperation)
exten => 1,2,Hangup()

exten => 2,1,Playback(sorry)
exten => 2,2,Hangup()

Do i need to add full directory path as /src/usr/ivraudiofilename.wav in Background(/src/usr/ivraudiofilename.wav) or something else. Please help me . Thanks in advance.

Yes, you need to specify full path of an audio file if it is not in standard sound directory. i.e. /var/lib/asterisk/sounds/

–Satish Barot