Failed to tag MP4 file

[Claire]

Hello, I installed the last version of get-iplayer for Windows XP, and I 
have encountered several problems. I must say I don't reside in the UK 
and, more importantly, I have very little idea of commands in general. 
The command line I wrote is:

get_iplayer 
--pid=http://www.bbc.co.uk/iplayer/episode/b0167k1c/hd/Planet_Dinosaur_The_Great_Survivors/ 
--partial-proxy --proxy="http://217.23.230.254:80" 
--flvstreamer=/path/to/rtmpdump --modes=rtsphd

The proxy I used is a public proxy which is fully working at the moment. 
I'm aware that I will have to change it eventually.
If I didn't specify any mode, it offered some examples of the modes 
available. I wanted to download the best quality version. However, if I 
got the video info, it didn't specify any possible mode. I don't exactly 
know what I could learn with that information.

Problems I have encountered:

- Even if I choose rtsphd mode, it seems to attempt to download a low 
quality version.
- Whenever it seems to start downloading, I get the following error:

APar_readX read failed, expect 12, got 0: No error
INFO: Command exit code 1 (raw code = 256)
WARNING: Failed to tag MP4 file.

In my recordings folder I can only see a 0kb mp4 file. There was a 
similar problem in the mailing list archive, but the possible solutions 
were for Ubuntu. If there is a way to apply those in Windows, I don't 
know how.

The whole text:

get_iplayer v2.80, Copyright (C) 2008-2010 Phil Lewis
   This program comes with ABSOLUTELY NO WARRANTY; for details use 
--warranty.
   This is free software, and you are welcome to redistribute it under 
certain
   conditions; use --conditions for details.

INFO: Using Proxy http://217.23.230.254:80
INFO: Episode-only pid detected
INFO: Trying pid: b0167k1c using type: tv
INFO Trying to stream pid using type tv
INFO: pid found in cache
Matches:
502:    Planet Dinosaur - 6. The Great Survivors, BBC One, Audio 
Described,Factual,HD,Highlights,Popular,Science & Nature,TV, 
default,audiodescribed,

INFO: 1 Matching Programmes
INFO: Checking existence of default version
INFO: rtsphd1,rtsphd2 modes will be tried for version default
INFO: Trying rtsphd1 mode to record tv: Planet Dinosaur - 6. The Great 
Survivors

INFO: File name prefix = 
Planet_Dinosaur_-_6._The_Great_Survivors_b0167k1c_default
INFO: Recording Low Quality H.264 stream
INFO: Recorded 
D:\Downloads\Flashget\Planet_Dinosaur_-_6._The_Great_Survivors_b0167k1c_default.mp4

INFO: Downloaded Thumbnail to 
'D:\Downloads\Flashget\Planet_Dinosaur_-_6._The_Great_Survivors_b0167k1c_default.jpg'
INFO: MP4 tagging MP4 file
APar_readX read failed, expect 12, got 0: No error
INFO: Command exit code 1 (raw code = 256)
WARNING: Failed to tag MP4 file