Decoding VOIP RTP session

Hello, When I try decode raw audio data of RTP stream by va_g729_decoder- got NOISE instead normal audio.(This issue only when few RTP streams in the one session) As you can see Session has few RTP stream on the same SRC DST ports and all stream has same SSRC. Total audio duration was 30 sec = why wireshark show RTP1=33sec RTP2=24sec RTP=12sec SDP

Via: 
From: 
To: 
Call-ID: 
CSeq: 1 INVITE
Contact: 
Content-Type: application/sdp
Server: MERA MVTS3G v.4.3.0-40
Content-Length:   260
v=0
o=- 1439471899 1439471899 IN IP4 
s=-
c=IN IP4 
t=0 0
m=audio 24130 RTP/AVP 18 101
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
a=silenceSupp:off - - - -

Version 1.12.7 (v1.12.7-0-g7fc8978 from master-1.12)
Running on 64-bit Windows 7 Service Pack 1, build 7601,
with WinPcap version 4.1.3 (packet.dll version 4.1.0.2980),
based on libpcap version 1.0 branch 1_0_rel0b (20091008),
GnuTLS 3.2.15, Gcrypt 1.6.2, without AirPcap.
Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, with 12063MB of physical memory.

LINK to the Wav file with result of decoding