gnupg - I can’t get `git tag -s` to ask for my GPG password -

I can execute a GPG function manually, which indicates your password via poutry, temporarily With this password I GIT tag -s and it works, other wishes I get:

  gpg: signature failure: Operation canceled GPG: signature unsuccessful : Operation canceled error: Failed to sign GPG data: Error on tag Unable to Kshr  

I have established through Hombre to'm using Mac OS X 10.10.2 and Grit and Jianupiji 2.1 (advanced). How do I get git tag -s to ask my password?