Files created within the Macintosh OS consist of two linear sequences of bytes known as forks.
Every file has both forks, but either or both may be empty.
When a file created by the Macintosh OS is stored on a Windows server, it is stored in a single file that contains a stream for each fork.
When a Windows-based application gains access to a file created by a Macintosh client, File Server for Macintosh presents only the data fork because the data fork is the equivalent of the representation of files on Windows platforms. Windows-based applications may not access the resource fork.
There is no workaround for the behavior, which is by design.