iPhone TIPS: How to Fix Expired iPhone Developer Certificate

Today I upgraded my Xcode development environment from iPhone 2.2.1 SDK to the latest released iPhone 3.0 SDK. However, as soon I tried to build and run my program into the device, it complains with this message:

"Code Sign error: The identity 'iPhone Developer' doesn't match any valid certificate/private key pair in the default keychain"

I started the keychain Access program on my MacBook and found out that my iPhone Developer Certificate was expired! To solve this issue was easy! Q: How did you solved it? A: Just as soon you logged into the iPhone Developer Portal, you simply use the "Development Provisioning Assistant"
Just click the Launch Assistent button and follow the steps and within 5 to 10 minutes, you are u and running.
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