Rahul,
If you have successfully registered the device then this rules out most connectivity issues.
If you haven't configured PUSH notifications, then you will have to manually tell the mobile app to check for new transactions. You can do this my pulling down on the page that shows your registered accounts - or use the "arrows in a circle" icon in the account you want to check (same page as the TOTP code is shown).
If transactions still fail to show, you could check the request.log on the Reverse Proxy to see if you are receiving the transaction lookup from the app and if it is being correctly authenticated (username shows in request log). If you need more detail, you will need to enable pdweb.snoop trace to see full request from the application and accompanying response. You could also check for errors/exceptions in the runtime messages.log file.
Jon.
------------------------------
Jon Harry
Consulting IT Security Specialist
IBM
------------------------------