Unlock Sony Ericsson Z750I

hi, can someone help me unlock my sony ericsson z750i it is a cid 52Welcome to SEtool2 ( LITE edition ) v 1.11
supported DB2010/DB2012 CID49/50/51/52, DB2020 CID49/51/52
Loaded 51 flash descriptors

if you like LITE edition - please visit http://www.setool.net and buy FULL.

ChipID:C802,EMP protocol:0401
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
skipping empty loader...
Can't load ID loader !
Elapsed:0 secs.
ChipID:C802,EMP protocol:0401
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
skipping empty loader...
phone pre-boot failed,possible RECOVERY needed.
Elapsed:6 secs.
Can't load ID loader !
Abort all operations.
Elapsed:1 secs.
Will backup GDFS now.
ChipID:C802,EMP protocol:0401
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
skipping empty loader...
Elapsed:6 secs.
ChipID:C802,EMP protocol:0401
PHONE IS RED RETAIL PRODUCT
FLASH CID detected:52
skipping empty loader...
Elapsed:5 secs.

that is the log from se toolz

and why does se toolz 2 lite not have sony ericsson z750i in the list of phones?