sharing an external hard drive

[tgarnand]

I have 8 Mac Pro G5 computers. I have purchased a Seagate 500GB external Hard Drive for Mac to one of these computers and enabled sharing. I am able to connect to this hard drive from all remote computers and the remote computers are able to save files and folders. My issue is when a remote computer tries to copy a root folder from the networked external hard drive by "drag and drop" to the remote computer's desktop it seems that only the root folder is being copied and none of the sub folders or files. I need it to copy everything and paste it onto the remote computer's desktop. I tried pressing and holding the "option" key while dragging and dropping but ended with the same results. Any suggestions as to what I may be doing incorrectly? Thank you in advance.