D40x .NEF to DNG conversion fail

I recently got interested in taking HDR photos with my D40x and have taken a few RAW formatted photos that I was going to use.  Excited as I was when I tried opening them in PS CS2 I was equally disappointed when I realized I couldn't get them to open.   I've never updated my PS CS2 program since the day I got it so I've tried everything and I'm still at a loss, I did the following please let me know if I missed something...
Downloaded PS CS2 version 9.0.2
Downloaded DNG Converter and Camera Raw 3.7
When I open the converter I select the folder that my .NEF files are in and select CONVERT and it spits out this message, "There was an error parsing the file," for every image status.  I eventually gave up trying to convert them to DNG and just tried opening them directly into PS CS2 by going to File/Automate/Merge to HDR.  Doing this gave me an error message as well but said, "Could not complete the merge to HDR command because a command was not available."  So I tried to open it by simply going to File/Open and I received a message that said, "Could not complete your request because it is not the right kind of document."
Anyone else have some ideas of what I could possibly do to get these RAW .NEF photos into my CS2?  Any help is appreciated!
Thanks in advance,
Corey

Of course you can use the free DNG converter, but if you want the convenience of opening your NEF files directly, there's no time like the present to upgrade to Photoshop CS5.  I don't think you'll get upgrade pricing any longer once Photoshop CS6 releases.
-Noel

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    +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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