Yeelight change color not responding


I try to change color to my bulbs via alexa voice assistant but when i give the command her answer me that the light is not responting.all other commands and scenes links its work fine.

P.s : i have same name to bulbs at yeelight app and alexa app and also i try disable/enable skill.

Mi ID:636721359

Server: singapore

App firmware update

Bulbs firmware update:2.0.6_0035

Can you help me?

Thank you