Unable to give another developer permission

i cant give another developer permission, while using developer’s subscription.

i tried giving another developer permissions to modify the data service but it wont work i wanna know why. i am currently subscribed to the developer’s plan.

Are you the app owner in that application?

yh sure

What’s your app id?

here you go 289CE5B0-29C6-07EE-FF20-002435AFFA00

The reason it doesn’t work is explained in the tooltip that shows up for each disabled checkbox:

The functionality you’re looking for is available in the Cloud9 or Cloud99 plans.

Regards,
Mark