File Sharing Tiger


I am file sharing (sort of) using Tiger. I have enabled it thru the sharing folder (in Sys Pref) on all 20 computers. The files & folders (having checked Get Info) are not locked.
One computer will connect to the "sharing computer." It will open the file (Appleworks). The next computer will connect to the "sharing computer" and receive the message, "This file is locked or in use." That's it. End of story. No friendly message, "Would you like to open a copy?"
I used to share with no problem when all were using Jaguar (10.2).
Please advise. Any suggestions are appreciated.
Thanks. : )