How to import GnuPG keys ?

I am trying to import a gnupg key created with WinPT but I am receiving this error .


gpg: key has been created 6743 seconds in future (time warp or clock problem)
gpg: key 6F0349AA: invalid self-signature
gpg: key has been created 6743 seconds in future (time warp or clock problem)
gpg: key 6F0349AA: invalid subkey binding
gpg: key 6F0349AA: no valid user IDs
gpg: this may be caused by a missing self-signature
gpg: Total number processed: 1
gpg: w/o user IDs: 1



Any idea ? Anyone was able to import a key created with WinPT PGP or other openPG softwares ?

Thank you