I have not been able to get my app to run on iOS 5.1. It crashes immediately after start up on the device. I know that app is not crashing because it runs fine on iOS 5.0. I've tried JailCoder, this and similar tutorials, signing manually with ldid, nothing works. Devlopement of my app has come to a halt because of this problem. Is there something else I can do? This is very frustrating.
It seems that you haven't given the proper chmod settings to your app executable. Try (as root):
chmod 755 /Applications/Brandsonic\ Web\ mobile.app/Brandsonic\ Web\ mobile
You may also need to fake codesign the app to run:
ldid -S /Applications/Brandsonic\ Web\ mobile.app/Brandsonic\ Web\ mobile