need some help with DNG and error parsing the files

Ok, so I found out that I can't open NEF files with CS2 from my Nikon D3100 - unless I upgrade to CS6, or use the DNG converter.  I did download the DNG converter that came with the Camera RAW 3.7 (for CS2) in one of Adobe's links, but when I try to convert the NEF files, the DNG converter says "There is an error parsing the file".   If it helps, I have Windows 7.  Is there a different version of the DNG converter I should be using?  Thanks!