OK..... I had a similar issue where my windows wasn't letting the DDA communicate with the program when I plugged it in. I run windows 7, 64bit and here's the issue....
with 64bit OS's.... they don't like it when devices don't have "signed" driver. That being said.... it won't run on your cpu.... unless you "hack" the drivers and sign them yourself.
I did a bit of google searching (took me about 3 days to find the right shiz) and finally found some help. There's a program you can download that basically puts your computer into "test mode" which is what you would use if you wanted to mess with files and change stuff. This program then also has an option for you to sign device drivers. You just click that, type in the file name you want signed, hit apply, restart your cpu (again in test mode) and then badda bing!!! you plug in your USB and up pops the DDA program and you can view your runs.
here's a link to the program:
http://www.ngohq.com/home.php?page=dseo
If you google "disable driver signing" or something like that, you'll get the process to turn the system check off however it didn't work for me. they are cmd line codes that you copy/paste into your cmd prompt. whenever I did it, it said it was good to go but again would not let my DDA be recognized when I plugged it in.
The DESO program works. Hope this helps!!!