[Sony Cross-Device General] omergh:
hi everyone i am using lastest lollipop firmware on my z2 tablet but i wanna change the market from customized ncb to customized ce4 i have download rom with xperifirm create with flashtool than i try to flash the rom but i see this message and flash aborting usb deugging and unknown source allowed sorry for my bad english and thenks for answers

19/057/2015 00:57:58 - INFO - Flashtool Version 0.9.18.5 built on 14-02-2015 15:30:00
19/057/2015 00:57:58 - INFO - Executing search strategies to find proxy selector
19/057/2015 00:57:58 - INFO - No proxy found for IE. Trying next one
19/057/2015 00:57:58 - INFO - Strategy firefox failed trying next one : No Firefox installation found
19/057/2015 00:57:58 - INFO - No proxy found for java. Trying next one
19/057/2015 00:57:58 - INFO - Syncing devices from github
19/057/2015 00:57:59 - INFO - Scanning devices folder for changes.
19/058/2015 00:58:07 - INFO - Pulling changes from github.
19/058/2015 00:58:07 - INFO - Devices sync finished.
19/058/2015 00:58:12 - INFO - Device disconnected
19/001/2015 01:01:51 - INFO - Selected Bundle for Sony Xperia Z2 Tablet (SGP511). FW release : 23.1.A.1.28. Customization : Customized CE4 1285-4249
19/001/2015 01:01:51 - INFO - Preparing files for flashing
19/003/2015 01:03:13 - INFO - Please connect your device into flashmode.
19/004/2015 01:04:08 - INFO - Device connected in flash mode
19/004/2015 01:04:08 - INFO - Opening device for R/W
19/004/2015 01:04:09 - INFO - Reading device information
19/004/2015 01:04:09 - INFO - Phone ready for flashmode operations.
19/004/2015 01:04:09 - INFO - Current device : SGP511 - CB5126ND2N - 1281-8175_R2C - 1278-4514_23.1.A.1.28 - GLOBAL-WIFI16G_23.1.A.1.28
19/004/2015 01:04:09 - INFO - Start Flashing
19/004/2015 01:04:09 - INFO - Processing loader.sin
19/004/2015 01:04:09 - INFO - Checking header
19/004/2015 01:04:09 - INFO - Flashing data
19/004/2015 01:04:09 - INFO - Processing of loader.sin finished.
19/004/2015 01:04:09 - INFO - Loader : S1_Root_9c84 - Version : MSM8974AB_27 / Boot version : S1_Boot_MSM8974AB_LA3.0_L_15.4 / Bootloader status : ROOTABLE
19/004/2015 01:04:09 - INFO - Processing partition-image.sin
19/004/2015 01:04:09 - INFO - Checking header
19/004/2015 01:04:09 - INFO - Flashing data
19/004/2015 01:04:09 - INFO - Processing of partition-image.sin finished.
19/004/2015 01:04:09 - INFO - Parsing boot delivery
19/004/2015 01:04:09 - INFO - Phone boot version : S1_Boot_MSM8974AB_LA3.0_L_15.4. Boot delivery version : S1_Boot_MSM8974AB_LA3.0_L_15.4
19/004/2015 01:04:09 - INFO - Boot delivery up to date. Nothing to do
19/004/2015 01:04:09 - INFO - Processing kernel.sin
19/004/2015 01:04:09 - INFO - Checking header
19/004/2015 01:04:09 - INFO - Flashing data
19/004/2015 01:04:11 - INFO - Processing of kernel.sin finished.
19/004/2015 01:04:11 - INFO - Processing fotakernel.sin
19/004/2015 01:04:11 - INFO - Checking header
19/004/2015 01:04:11 - INFO - Flashing data
19/004/2015 01:04:13 - INFO - Processing of fotakernel.sin finished.
19/004/2015 01:04:13 - INFO - Processing amss_fs_2.sin
19/004/2015 01:04:13 - INFO - Checking header
19/004/2015 01:04:13 - INFO - Flashing data
19/004/2015 01:04:13 - INFO - Processing of amss_fs_2.sin finished.
19/004/2015 01:04:13 - INFO - Processing amss_fs_1.sin
19/004/2015 01:04:13 - INFO - Checking header
19/004/2015 01:04:13 - INFO - Flashing data
19/004/2015 01:04:13 - INFO - Processing of amss_fs_1.sin finished.
19/004/2015 01:04:13 - INFO - Processing amss_fsg.sin
19/004/2015 01:04:13 - INFO - Checking header
19/004/2015 01:04:13 - INFO - Flashing data
19/004/2015 01:04:13 - INFO - Processing of amss_fsg.sin finished.
19/004/2015 01:04:13 - INFO - Ending flash session
19/004/2015 01:04:13 - ERROR -
19/004/2015 01:04:13 - ERROR - Error flashing. Aborted
19/004/2015 01:04:13 - INFO - Device connected in flash mode
19/004/2015 01:04:14 - INFO - Device disconnected
19/004/2015 01:04:17 - INFO - Device connected in flash mode
19/004/2015 01:04:20 - INFO - Device disconnected

same thing happens when i try to flash 23.1.A.0.690 customized ce4 rom