APNS : no valid 'aps-environment' entitlement string found for application

It is common to get this error if we are going to implement APNS on our currently running application..

My application runs fine on device, To implement APNS I configure the App Id on iPhone Developer Program also look at how to tab, and also go through this guide

implement APNS on client source
to implement this , there are lot of good tutorial on internet
http://www.z2live.com/push_notifications
http://www.macoscoders.com/2009/05/17/iphone-apple-push-notification-service-apns/
http://ameyashetti.wordpress.com/2009/07/31/apple-push-notification-service-tutorial/

after do all these We have to create a new provisioning profile(or remove the old one and create with same name) and download it and install both xcode and iphone

remove old profile from xcode and iphone and install new profiles

Dont forget to change the "code signing identity" in settings and "Bundle Identifier" in .plist file if you are create new profile

this will solved the above mentioned error