Radio 105, Italia: rtmpdump downloading problem (repeat some second)

[basix86]

Hello, i download the radio registration from "Radio 105, Italia"with this code:

rtmpdump -r rtmp://fms01.105.net/vod -y mp3:105ondemand/replica_zoo/zoo_20111014 -o zoo29.flv

The download is ok, but when i playing the file audio, there are some repetition (few second) in the audio stream.

I think this problem is due to multiple downloads:

RTMPDump 2.4 git-b627335 2011-7-23
(c) 2010 Andrej Stepanchuk, Howard Chu, The Flvstreamer Team; license: GPL
Connecting ...
INFO: Connected...
Starting download at: 0.000 kB
INFO: Metadata:
INFO:   duration              5163.60
57.570 kB / 3.53 sec (0.0%)
INFO: Metadata:
INFO:   duration              5163.60
163.283 kB / 10.06 sec (0.1%)
INFO: Metadata:
INFO:   duration              5163.60
293.099 kB / 18.08 sec (0.3%)
INFO: Metadata:
INFO:   duration              5163.60
422.914 kB / 26.09 sec (0.5%)
INFO: Metadata:
INFO:   duration              5163.60
552.729 kB / 34.11 sec (0.6%)
INFO: Metadata:
INFO:   duration              5163.60
682.545 kB / 42.13 sec (0.8%)
INFO: Metadata:
INFO:   duration              5163.60
....

How can i solve this problem?

Thanks