You probably have an issue down the far end of the circuit. An electrician needs to do the necessary things to trace and fix the issue, unless you're handy with taking apart and rewiring receptacles properly. The first thing you can do is figure out what receptacles are on the same circuit and unplug any devices from those, see if that makes a difference. Try to remember if there is any other devices on the same circuit that tend to have tripping issues in the breaker box. Any clues that might help trace the problem. When you replace the old receptacle to this box, do those other receptacles still work as before? If not, you may have damaged a load line in the box, a short where it leaves the box maybe.