Default Problem With Flashmode & Cwm

Hi so yesterday I tryed to install the android Rom stock 4.0.4 For my xperia j but I cant enter to flashmode I unplug the cable & turned of the phone but when I holding the VOL - and connect the phone to the pc the led is changed to green and only vibtate but flashtool dont detect the phone and with cwm I cant enter to them I installed the cwm with the pc with a .bat file but I not installed a kernel
And nothing only the cwm but when I try to go to cwm and I press the vol - constantly in the sony logo the phone is turning off no go to cwm can anyone help me?.
NOTE:
Phone is rooted
The bootloader of my phone cant be unlocked because the text with allowed bla bla bla says: No
And the vol - button working perfectly
Sent from my ST26a using XDA Free mobile app