Open the file in FMS, not FMP. Use the FMS remote administration tool to open the file, either from the file or remotely. Best is to use the RAT to upload the file to the server as well, it sets the correct permissions..
The Server is not responding to my request to open a database. What do I do? also, what is RAT?
RAT - remote administration tool.
From your original post it sounds as though you are trying to open the file in FMP, or FMP is open on the server computer. Close FMP and try opening FMS again.
What version FMS and what OS is it running on?