Xcode valid signature id not found

Question

I can not find a solution to this problem for 2 weeks !!! This is huge.

When I try to test my application, I encounter an error. Xcode shows: A valid signature identifier for ... not found. I do not know what to do, and I tried a lot. Please, help.

Here are the print screens:

Image1 http://img838.imageshack.us/img838/9749/20120910195154.png Full size

Image2 http://img100.imageshack.us/img100/9126/20120910195440.png Full size

Answer 1

I think that removing all certificates and re-creating them should solve your problem.

Check the top answer in this thread to take steps to complete the same

Xcode could not find a valid private key certificate pair for this profile in your keychain