Xperia L stuck at recovery screen

Model - Sony xperia l - C 2014

I wanted to flash CM12 to my device. I followed the instructions on Cyanogenmod site.
I enabled USB debugging mode.
I unlocked the bootloader (as per the instructions on sony)
I'm using a linux machine. I've installed adb and fastboot tools.
I havent backed up my bootloader or system (but ive taken data backup before starting the process)

1) When i try to flash the CM ROM using adb sideload method, i get the error..
this package is for device c2105 c2104 c2105 c2104 taoshan this device is .

2) If i try to use fastboot method to flash new recovery, using the folowing command
#fastboot flash recovery cm-12-20150906-NIGHTLY-taoshan-recovery.img
i get the error..

sending 'recovery' (9702 KB)...
OKAY [ 0.308s]
writing 'recovery'...
FAILED (remote: Command not allowed)
finished. total time: 0.310s

Now my phone is unable to boot normally. it gets stuck at recovery.

This is the first time i've tried to flash a new ROM. Any suggestion would be greatly appreciated.
Thank you