PDF file cannot be open in DFS or NFS.

When I installed Adobe Reader 10.0 is in a protected mode. One of the features of the secure mode is that I cannot open PDF files whose source is DFS or NFS. A message appeared: PDF files in shared locations on a distributed or networked file system (DFS/NFS) cannot be opened. When attempting to open such file, I get an error: Access denied." What will I do? Please help.
