Sccp conference

Good evening.
help please
There Asterisk 10.12.2 bolted to it sссp 4.0.1 Stable
When you press conference on the phone cisco 7962
Asterisk falls and In the logs is
[2013-05-22 05:47:07] ERROR[17486]: astobj2.c:121 INTERNAL_OBJ: bad magic number 0x73 for 0x2277848
[2013-05-22 05:47:07] ERROR[17486]: astobj2.c:121 INTERNAL_OBJ: bad magic number 0x73 for 0x2277848
[2013-05-22 05:47:07] ERROR[17486]: astobj2.c:121 INTERNAL_OBJ: bad magic number 0x73 for 0x2277848
[2013-05-22 05:47:07] ERROR[17486]: astobj2.c:121 INTERNAL_OBJ: bad magic number 0x73 for 0x2277848
[2013-05-22 05:47:07] ERROR[17486]: astobj2.c:121 INTERNAL_OBJ: bad magic number 0x73 for 0x2277848
[2013-05-22 05:47:07] ERROR[17486]: astobj2.c:121 INTERNAL_OBJ: bad magic number 0x73 for 0x2277848