can't start link.beat remotely

Jonathan Hallstrom's icon

I want to start link.beat on one machine from another. I've tried sending the the output of a toggle through udpsend and when it arrives it turns on the toggle connected to link.beat on the receiving computer but nothing happens - link.beat won't start. the weird thing is that clicking on the very same toggle "locally" (on the receiving machine) does start link.beat. Any idea why?