My bad- I assumed when you mentioned "I looked through the folder and it didn't detect" you meant on the CD and not the download.
If the vista 64 bit driver didn't work I don't know what to tell you- it might just not be supported for windows 7. There are no driver downloads for windows 7 for this device that I can find so it seems like the most possible explanation. I don't know what the "legacy device" mentioned means but you can try it.
Sorry I can't be more help