Sip xmit warning?[Solved]

Hello, I have two servers interconnected with SIP protocol, now I’m having this warning in one server:

[Dec 7 13:32:06] WARNING[12966]: chan_sip.c:3584 __sip_xmit: sip_xmit of 0xb7959150 (len 543) to XXX.XXX.XXX.XXX.:0 returned -1: Address family not supported by protocol, The XXX are the IP.

This warning apear every second in the CLI, i search in google and many forums but there is no answer.
One server have asterisk- the other has asterisk-1.4.18

sorry my english

Solved when upgrade to asterisk