hey guys im tryn to flash my firmware withn XS++ to RCA firmware on my k750i
but it keeps failing heres the log

17:46:19| XS++ v1.0 Ready !
17:46:25| Attempting to open the interface...
17:46:25| ++++++++++++++++++++++++++++++++++
17:46:25| Turn off phone
17:46:25| Hold C Button on phone and connect phone.
17:46:25| You have 30 seconds.
17:46:25| ++++++++++++++++++++++++++++++++++
17:46:30| PORT STATUS: ACTIVE
17:46:30| Baseband ID: 8040
17:46:30| Hardware Platform: db2010 Marita compact
17:46:30| Protocol Version: 3.1
17:46:30| Sending loaders\db2010_cid00_prodid_p3k.bin...
17:46:30| This is a PRODUCTION_ID loader
17:46:30| Activating GDFS...
17:46:30| phone name detected
17:46:30| +++ Restarting phone - please wait...
17:46:30| ++++++++++++++++++++++++++++++++++
17:46:30| Disconnect phone from USB-port and wait for
17:46:30| further instructions.
17:46:30| You have 8 seconds.
17:46:30| ++++++++++++++++++++++++++++++++++
17:46:38| Open the battery-cover and reinsert the battery.
17:46:38| Hold C Button on phone and connect phone again.
17:46:38| You have 30 seconds.
17:46:38| ++++++++++++++++++++++++++++++++++
17:46:41| Baseband ID: 8040
17:46:41| Hardware Platform: db2010 Marita compact
17:46:41| Protocol Version: 3.1
17:46:41| +++ Phone has restarted successfully...
17:46:41| ++++++++++++++++++++++++++++++++++
17:46:41| PHONE INFO
17:46:41| ++++++++++++++++++++++++++++++++++
17:46:41| DBID: db2010
17:46:41| OTP CID: 36
17:46:41| EROM CID: 36
17:46:41| EROM color: Brown
17:46:41| IMEI: 35655300xxxxxx
17:46:41| Phone: K750
17:46:41| Operator: VFE_2
17:46:41| CDA: CDA102338/2 R36A
17:46:41| Firmware: R1L002
17:46:41| EROM: n/a
17:46:41| ++++++++++++++++++++++++++++++++++
17:46:41| Ready for operation!
17:54:54| Sending loaders\db2010_cid00_prodid_r2f.bin...
17:54:54| This is a PRODUCTION_ID loader
17:54:54| Sending loaders\db2010_cid00_cert_r2e.bin...
17:54:54| This is a CERTIFICATE loader
17:54:54| Breaking in...
17:54:54| Waiting for breakin hello...
17:54:54| Sending loaders\db2010_cid36red_flash_r2ab.bin...
17:54:55| This is a FLASH loader
17:54:55| +++ Now flashing firmware main...
17:54:55| Sending flashfile C:\Documents and Settings\KISHAN\Desktop\K750_R1CA021_MAIN_EU_1_CL_RED36\K750_R1CA021_MAIN_EU_1_CL_RED36.mbn
17:54:55| 288 flashblocks
17:54:55| Binary acknowledge failed with: 15
17:54:55| Failed
17:55:07| +++ Sendinging shutdown signal to phone...
17:55:09| Shutting down...

can any one shed ne light to this problem thanks

ur erom colour is brown
u r tryin to flash wit files meant for red erom
basically wat u hav to do is change ur erom from brown to red
but i dun hav k750 so i cant teach u more
but if im not wrong
there are a few tutorials here tat can help u

You need to flash EROM using FAR and SEFP plugin. But, i can not find topic with description here. And, you can download newer XS++ version.

UPD:
http://forums.se-nse.net/index.php?showtopic=4376