Mac users limit to 2GB space on NTServer

Macintosh users could not save files of more then 2GB on the NT4 Server SP6a when services for Macintosh is already added and a folder is created to share out to Macintosh users.
There are in fact 10GB of free space on the harddisk. Is there anyway to fully utilise all the available free space on the harddisk from the single folder shared out ?