Basic PokeSav question

[Sephiroth0327]

Just finished reading the various guides/FAQs on PokeSav and I just have a few basic questions. First off, I am working with an Action Replay DSi and my DS Lite (the instructions say you can use the DSi AR with DS Lite). I am not interested in generating codes though - I'm really only interested in backing up my save file and transferring a copy to my PC to PokeSav.

I am running into an issue though and wanted to confirm that I am doing this correct. Here's what I am doing:

• Insert AR into my DS Lite
  
• Insert 256MB Micro SD Memory Card into AR
  
• Insert Pokemon Platinum
  
• Turn on DS - AR screen loads
  
• Select Saves and follow the on-screen options to make a back-up of my save file. This results in a .duc file being saved to the memory card.
  
• At this stage, I just want to move the .duc to my PC so I can convert it into a .sav file. I am running Windows 7 64 bit and have installed the correct drivers for my AR but I would expect to see the device listed when I go to Computers but it's not there
  
• No worries, I think. I just pop the Micro SD in my cell phone and email the .duc file to myself and download it to my PC
  
• Coverted the duc. to a .sav file by going to http://shunyweb.info/convert.php
  
• Open PokeSav for Platinum
  
• Open .sav file
  Ok, here is where I run into a problem. Rather than seeing my party pokemon, trainer name, id, etc..., I just see a bunch of nonsense. My .sav file is 512KB and I have "512KB" selected under Save File Size. Am I doing something wrong?
  I went to GameFAQs and downloaded one of the .duc files and tried to convert it the same way and that worked. So did I backup my save file incorrectly?