I have created a tardy database for all of the students in our school on a Mac with FileMaker Pro 5.5 . When I try to open it on a PC with Multi-Share enabled with the host machine running the file, it says it can not read the file from the disk that it is on. What can i do? I have already tried adding the .fp5 extension to it but it did not help. It is important for it to be cross-platform. Thanks!