iphone: unable to deploy app on iphone

I have downloaded the certifi开发者_JAVA百科cate from developer portal, downloaded provisioning profile organizer is showing provisioning profiles I have provisioning profile installed on my device as well

but when I am trying to change change the developer profile then getting this error

"The name (“common name”) of a valid code-signing certificate in a keychain within your keychain path. A missing or invalid certificate will cause a build error. [CODE_SIGN_IDENTITY]"

Problem has been fixed by changing the Application's Identifier from '59R497CZ5Y.com.markmckie.ccna' to 'com.markmckie.ccna'

Resource: Error Whilst Compiling App