Yes, because you havent installed gapps! Cm10 roms doesnt work properly without gapps: no locksceen, no home key..
where can i get the gapps package for this rom?????
Moreover , home button isn't working in this rom ,neither the hardware button nor the nav bar home button ,and there is no lockscreen as well ,(it is set on slide)
[ i am coming from cm 10.1 by konsta t and did a complete wipe before flashing this one]
You can get gapps from the OP.