Scene not working with Alexa echo dot

Have bought the Yeelight LED Bulb (color).
Set up was easy with wifi router. Scene works on the Mi apps.
Able to link Mi account with Alexa Echo dot.

All light function (On/OFF , change color, dim, brightness works)
Except the customize and default Scene Alexa echo dot does not recognise.

My bad - Scene now works on Echo dot.
The correct phrase for Alexa is " Alexa turn on Light one (name of light)" and the for the Scene "Alexa turn on Bedtime (The name of the Scene created in Yeelight app and discovered on the Alexa apps on andriod.

Cheers! Thanks for choosing Yeelight.