Unable to log in

I had this problem before. I ended up rebuilding WordPress to fix this. Now it is happening again during yet another rebuild. I don’t like WordPress right now!!!

I am receiving this error with ALL user accounts (including the orignal administrator account that was created during setup):

Your account has to be ac

tivated before you can login. You can resend email with verification link by clicking here.

I did not make any changes from the time it was working to the time it was not working.

I can’t create a new user. The activation link does not actually send, so I can’t activate any account. Should I stop trying to use WordPress?