yee light smart colour bulb and white bulb

hi there I have a yee light colour and white bulbs. but unable to get them to work with amazon alexa…!!

I can pair and control the bulbs no problem with the Yeelight or the Mi Home app (andiod app), but when I try to connect them to Alexa / to the Alexa App. It will always tell me that there are no new devices. I enabled the Yeelight skill, and linked my Mi Account successfully. I tried different servers in the Xiaomi Apps (Singapore, USA, Germany), but to no avail.

Anyone have any ideas on how to solve this?
Many thanks