Client server with ms access

I am now doing a client server project. the situation is that i have the same application running on
differrent machines. They are all accessing the same ms- access table in one server machine using DAO . I have to prevent one client from accessing the table , while another one is still accessing.If all the applications were running on a single machine I think i could've used mutex or some other thread
synchronization object. But with the processes running in diff. machines ; how do i synchronize?
Thanking you in Advance.

peace