fedora 20: mysq doesn't start automatically

[Rafnews]

Hi,

according to several webpages, once installed you can set the mysqld 
service enable and start automatically when fedora starts.
for that you must run:
systemctl enable mysqld.service
systemctl start mysqld.service

however in my case this only start mysqld service for the running time. 
Once computer is restarted, mysqld does not start automatically.

so where is the problem ?
should i use back chkconfig ?

thx.

A.