First of all, marry Christmas!

I have created a new user and added it to users and wheel group.
but when i log in with the new user and i try to log in in console as root it ask password, i type my root password and it says sorry.
I'm sure that the password is correct and it hasn't any special caracter or symbol that can cause problems.

Is it a bug? How can i solve it?

Thx in advance