Hello to all!
I have fresh installed elastix 1.6 (x86_64)
It works fine as PBX, but i can't setup a2billing(1.3.0 in this elastix)

i get this message when try 'goto' a2b:

Goto (custom-a2billing,somenumber,1)
[Mar 14 11:11:40] VERBOSE[4830] logger.c: -- Executing [somenumber@custom-a2billing:1] DeadAGI("H323/ip$192.168.2.55:1729/12543", "a2billing.php|1" ) in new stack
[Mar 14 11:11:40] WARNING[4830] res_agi.c: Running DeadAGI on a live channel will cause problems, please use AGI
[Mar 14 11:11:40] VERBOSE[4830] logger.c: -- Launched AGI Script /var/lib/asterisk/agi-bin/a2billing.php
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] ERROR[4830] utils.c: write() returned error: Broken pipe
[Mar 14 11:11:40] VERBOSE[4830] logger.c: -- AGI Script a2billing.php completed, returning 0
[Mar 14 11:11:40] VERBOSE[4830] logger.c: -- Executing [somenumber@custom-a2billing:2] Hangup("H323/ip$192.168.2.55:1729/12543", "" ) in new stack

advice, please,where is problem?

Sorry, there was not correct information in first post. not very fresh installed, but after installation of h323 by this procedure: asterisk.ru/knowledgebase/asterisk-h323
It is in russian, but it is possible on-line translate.
after this the a2billing became broken, as at first post. before it(billing) is working.
my knowledge of linux is not so good to explaine, how this h323 installation affects a2b.