Lt18i unlock failed

Welcome to Octoplus Suite version 1.5.1
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Platform: SE Qualcomm
Selected model: LT18i
Connecting to server...OK
Octopus smart card is present.
Checking smart card...OK
Smart card activations: LG, Samsung, SE Unlimited
Username: Default_user
Authorizing...
Checking balance...OK
Your balance: 0 credits.
To unlock LT18i you need to have 0 credits.
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Platform: SE Qualcomm
Selected model: LT18i
Please, reconnect battery, attach testpoint and connect USB cable...OK
Sending preloader...OK
Please, disconnect testpoint.
Waiting for preloader...OK
Reading info...
IMEI: 353440-05-797906-5
MSN: BX9030NRTS
Sending loader...OK
Reading info...OK
IMEI: 353440-05-797906-5
Checking security...OK
Reading security area...OK
Backup saved to "C:\Program Files (x86)\Octoplus\Octoplus_Suite\BACKUP
\Sony Ericsson_LT18i_35344005797906_08-03-2018_19-44-03.BKP"
Checking TA...OK
IMEI: 353440-05-797906-5
Calculating security on the server...
Sending TA to server...OK
Calculating. Please, wait...OK
Receiving TA...OK
Checking security area...OK
Writing security area...Failed!
Error code: ALP2OASDHH