XCode4 Building Problem - Code Signing Identity Ad Hoc missing

trying to build an ad hoc distribution wi开发者_运维技巧th Xcode 4. Consider that my project.xcodeproj was created with a very old version of Xcode. Now Looking around at Build Setting I cannot find Code Signing Identity Ad Hoc as shown into attached image:

Any help appreciated

@freedev I just wrote a blog post detailing the ad hoc process in Xcode 4 that should help you.

You might want to check this document out: Xcode 4 transition guide

Project and build settings are now at the top of the project files.