Plz help out in solving this issue

we are using g729 to male calls and whenever we get a OK form vendor
we get this message and there is no flow of voice

WARNING[12252]: chan_sip.c:2570 sip_write: Asked to transmit frame type 64, while native formats is 256 (read/write = 64/64)

v 10 23:31:06 NOTICE[12252]: rtp.c:331 process_rfc3389: Comfort noise support incomplete in Asterisk (RFC 3389). Please turn off on client if possible. Client IP: 72.37.161.230

<-- SIP read from 203.122.26.234:11333:

— (0 headers 0 lines) Nat keepalive —
== Parsing ‘/etc/asterisk/manager.conf’: Found
== Manager ‘sendcron’ logged on from 127.0.0.1
== Manager ‘sendcron’ logged off from 127.0.0.1
== Parsing ‘/etc/asterisk/manager.conf’: Found
== Manager ‘sendcron’ logged on from 127.0.0.1
== Manager ‘sendcron’ logged off from 127.0.0.1
– AGI Script agi-VDADtransfer.agi completed, returning 0
– Executing MeetMe(“SIP/SIPTRUNK-099cf748”, “8600051”) in new stack
– AGI Script VD_hangup.agi completed, returning 0
Nov 10 23:31:09 WARNING[12252]: chan_sip.c:2570 sip_write: Asked to transmit frame type 64, while native formats is 256 (read/write = 64/64)
Nov 10 23:31:09 WARNING[12252]: chan_sip.c:2570 sip_write: Asked to transmit fra me type 64, while native formats is 256 (read/write = 64/64)
Nov 10 23:31:09 WARNING[12252]: chan_sip.c:2570 sip_write: Asked to transmit fra me type 64, while native formats is 256 (read/write = 64/64)
Nov 10 23:31:09 WARNING[12252]: chan_sip.c:2570 sip_write: Asked to transmit fra me type 64, while native formats is 256 (read/write = 64/64)
Nov 10 23:31:09 WARNING[12252]: chan_sip.c:2570 sip_write: Asked to transmit fra me type 64, while native formats is 256 (read/write = 64/64)