Iphone development: codesign cannot access Keychain

I am stuck in the hell of keychain and iphone app cer开发者_开发技巧tification process.

I have the /usr/bin/codesign failed with exit code 1 error

I have tried everything including doing the process X thousand times from the beginning, checking the build and target settings, plist bundle id etc...

But one thing is surprising, when I build my application, the "Allow access to keychain for codesign" window appears for half a second and disappears, then the build error shows up.

I tried to modify the properties of the private key used to sign my application in the keychain Access to allow all applications (in the "access control" window). But when I save nothing happens, Keychain Access wont keep my modifications, whatever I do.

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Ok it was a rights issue, I just created a new user and everything works fine.