iOS: In App Auto-Renewable Subscription error while purchase

I have successfully implemented the in app purchases for consumable products. And it is working great.

Now i'm getting "Can't connect to iTunes store" when i'm trying to confirm the auto- renewable subscription. Is there anything special that we should do for the subscriptions.

Checklist that i have already gone through and verified several times

Tax, agreements are all set
Localization is all set i believe
Price tier is set
Tried new sandbox user with multiple territories (UK & Pakistan). Store is pakistani right now.

Solution

Found the solution after a lot of hit and try. I was missing period of subscription on iTunes connect.