Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
This doesn't work.
Create a Start Particle Behaviour in an Object's behaviour editor.
Edit the Anchor position with literal values = work!
Use a Set Input Field in either X or Y of Anchor Fields of the Particle System does not work. Ever.