I am running the latest asterisk CVS. root@silver /etc/asterisk # locate demo-thanks /var/lib/asterisk/sounds/demo-thanks.gsm This directory has 150+ files. I changed the [demo] section in extensions to [incoming] to play with this included definition: [incoming] ; ; We start with what to do when a call first comes in. ; exten => s,1,Wait,1 ; Wait a second, just for fun exten => s,2,Answer ; Answer the line exten => s,3,DigitTimeout,5 ; Set Digit Timeout to 5 seconds exten => s,4,ResponseTimeout,10 ; Set Response Timeout to 10 seconds exten => s,5,BackGround(demo-congrats) ; Play a congratulatory message exten => s,6,BackGround(demo-instruct) ; Play some instructions exten => 2,1,BackGround(demo-moreinfo) ; Give some more information. exten => 2,2,Goto(s,6) When someone calls, I get this error: -- Executing Wait("SIP/147.135.8.129-08146c60", "1") in new stack -- Executing Answer("SIP/147.135.8.129-08146c60", "") in new stack -- Executing DigitTimeout("SIP/147.135.8.129-08146c60", "5") in new stack -- Set Digit Timeout to 5 -- Executing ResponseTimeout("SIP/147.135.8.129-08146c60", "10") in new stack -- Set Response Timeout to 10 -- Executing BackGround("SIP/147.135.8.129-08146c60", "demo-congrats") in new stack Oct 10 21:48:38 WARNING[196619]: file.c:475 ast_openstream: File demo-congrats does not exist in any format Oct 10 21:48:38 WARNING[196619]: file.c:779 ast_streamfile: Unable to open demo-congrats (format ULAW): No such file or directory Oct 10 21:48:38 WARNING[196619]: pbx.c:4672 pbx_builtin_background: ast_streamfile failed on SIP/147.135.8.129-08146c60 fro demo-congrats Why can it not find the files?