I am presuming this issue arises under acrobat/reader as your code excludes presentation agent. The paths you are trying to use are not acrobat device independant paths, which basically uses a different notation to try and support cross platform uri's. You would need to use file://netapp/group/subdirectory and so on. In general it would be protocol: \ device \ path \ file. Anything else gets URI encoded.
That did it...adding "file:" before the pasted link worked fine.