Cannot set Messages as the default messaging app

I am not able to set massages as the default messaging app. Messages app is not displayed in the More Network > Change Messaging app . I tried accessing the same settings for different places but nothing happens. When I start the messaging app , pressing ok doesnt do anything.

I tried
1. Clearing cache and data
2.Reinstalling the apk file.

I am not able to send messages with the second sim. Hangout and messenger defaults to a particular sim.