Some applications cannot use UNC paths (that's where you just try to identify a network locations as //server/share). You should ALWAYS try to map a drive letter (on Windows) or actually mount the network location (on Mac or Linux) so that you can use a local reference, e.g., S: or /Volumes/B2music.
Then if you still have the same issue using a drive letter or local mount point you can say there's a problem. Otherwise you might just be using an application that doesn't like UNC paths.