I am using filemaker files stored on a server and accessed by 3 computers, 2 x PC & 1 x Mac. If a file is open on the Mac no other PC can open the same file (sharing is on, a dialog box appears that says "permission denied". The same applies with PC to PC, however if a PC has a file open, I can also open it on the Mac at the same time. All are using 8.5 pro. How can I have the same file open on all computers at the same time?