Can't get Automator to run a service when keyboard shortcut is pressed
I'm trying to set up some keyboard shortcuts. I want to be able to press a key to start the screen saver. I'm using OS X 10.9.5. I had it all set up and working but then it stopped working after a restart.
I started Automator, made a new Workflow of type Service. I selected "Start Screen Saver" (the local one, not the Remote Desktop one) from the Actions list and dragged it to the Workflow window pane. I set "Service receives No input" and saved it. Clicking Run starts the screen saver as expected.
Then I went to System Preferences, Security & Privacy, clicked the Privacy tab and Accessibility. I made sure Automator.app was listed and checked under "Allow apps below to control your computer."
Next I went to System Preferences, Keyboard, clicked the Shortcuts tab, clicked Services, scrolled down to the General category and saw the workflow I'd made listed. I clicked the Add Shortcut button and typed in a key (command shift F6).
Then pressing command shift F6 worked to start the screen saver. That was yesterday. But today after I've restarted the computer it no longer works.
The settings in System Preferences are not changed. I've tried changing them and setting them back. I've tried making a new workflow. But nothing has gotten this behavior back.
Opening Automator, the workflow, and clicking Run still starts the screen saver correctly.
Hitting the keyboard shortcut key will briefly flash the application name in the menu bar. But the workflow does not appear to run.
MacBook Pro with Retina display, OS X Mavericks (10.9.5)