Error Flashing Stock ROM with Flashtool in Sony Xperia M2 D2302

Hello Folks,
I am a newbie here... Sorry in case if I make any mistake explaining my problem.

Currently I am using Cygenogenmod 11 on my phone with android version 4.4.4.
Also I have CWM recovery version 6.0.5.1 installed.
My Phone is rooted with unlocked bootloader and also enabled debugging.

Now I am trying to install a stock ROM by by downloading it from flashtool via XPERIFIRM. But while flashing, Flashtool gives an error that " Flashing Aborted". So please help me how to get out of this painful error logs.

The logs are:

01/051/2015 23:51:04 - INFO - Selected Bundle for Sony Xperia M2 (D2302). FW release : 18.6.A.0.175. Customization : Customized IN
01/051/2015 23:51:04 - INFO - Preparing files for flashing
01/051/2015 23:51:41 - INFO - Please connect your device into flashmode.
01/052/2015 23:52:42 - INFO - Device connected in flash mode
01/052/2015 23:52:43 - INFO - Opening device for R/W
01/052/2015 23:52:43 - INFO - Reading device information
01/052/2015 23:52:43 - INFO - Phone ready for flashmode operations.
01/052/2015 23:52:43 - INFO - Opening TA partition 2
01/052/2015 23:52:43 - INFO - Current device : Unknown: Nov 10 2014/22:11:48 - ZH8004WWYU - Unknown: Nov 10 2014/22:11:48 - Unknown: Nov 10 2014/22:11:48 - Unknown: Nov 10 2014/22:11:48
01/052/2015 23:52:43 - INFO - Closing TA partition
01/052/2015 23:52:43 - INFO - Start Flashing
01/052/2015 23:52:43 - INFO - Processing loader.sin
01/052/2015 23:52:43 - INFO - Checking header
01/052/2015 23:52:43 - INFO - Flashing data
01/052/2015 23:52:44 - INFO - Loader : S1_Root_f82d - Version : LOADER_RELEASE_MSM8X26_31_AID_4 / Boot version : S1_Boot_MSM8x26_LA1.0_36 / Bootloader status : ROOTED
01/052/2015 23:52:44 - INFO - Max packet size set to 512K
01/052/2015 23:52:46 - INFO - Making a TA backup
01/052/2015 23:52:46 - INFO - Opening TA partition 1
01/052/2015 23:52:46 - INFO - Start Dumping TA partition 1
01/052/2015 23:52:47 - INFO - Finished Dumping TA partition 1
01/052/2015 23:52:47 - INFO - TA partition 1 saved to C:\Users\Ravi\.flashTool\registeredDevices\ZH8004W WYU\s1ta15-10-01_11-52-46.ta
01/052/2015 23:52:47 - INFO - Closing TA partition
01/052/2015 23:52:47 - INFO - Opening TA partition 2
01/052/2015 23:52:47 - INFO - Start Dumping TA partition 2
01/052/2015 23:52:47 - INFO - Finished Dumping TA partition 2
01/052/2015 23:52:47 - INFO - TA partition 2 saved to C:\Users\Ravi\.flashTool\registeredDevices\ZH8004W WYU\s1ta15-10-01_11-52-46.ta
01/052/2015 23:52:47 - INFO - Closing TA partition
01/052/2015 23:52:47 - INFO - Parsing boot delivery
01/052/2015 23:52:47 - INFO - Ending flash session
01/052/2015 23:52:47 - ERROR -
01/052/2015 23:52:47 - ERROR - Error flashing. Aborted
01/052/2015 23:52:48 - INFO - Device connected in flash mode