How to use drag feature in 2 layers?

Question

this.installDrag({layer:this.poiLayer,opt:'load',id:'poiLatlong'});
this.installDrag({layer:this.addNewPoiLayer,opt:'add',id:'poiLatlong'});

But drag is installing for only one layer , whichever i am calling later.

Answer 1

Aragon answer was not working for me. I needed a solution so I spent a few days and found one that works: creating 2 dragable layers at the same time in OpenLayers?

I hope that help!