There are lots of bugs in ADE2.0, including not seeing some devices properly.
Worth giving v1.7.2 a try (you can have both installed at once)
Version 1.7.2, it is a little difficult to find, available on Adobe site for Windows and for Mac.
The forum software is sometimes corrupting the link above. There shouldn't be a blank in 'editio ns.html'. The following redirects to the same page: http://tinyurl.com/diged172