S5620l unlock fail help

WHAT CAN I DO PLS BICOS I HAVE MANY OF IT. REGARDS

INFO : 1/1/2002 3:19:38 AM > Platform: Samsung Broadcom
INFO : 1/1/2002 3:19:38 AM > Selected port: COM58
INFO : 1/1/2002 3:19:38 AM > Selected model: GT-S5620L
WARN : 1/1/2002 3:19:38 AM > To connect GT-S5620L phone you have to perform the following steps:
WARN : 1/1/2002 3:19:38 AM > 1. Select Box Com port.
WARN : 1/1/2002 3:19:38 AM > 2. Connect Micro UART cable.
WARN : 1/1/2002 3:19:38 AM > 3. Insert the battery.
INFO : 1/1/2002 3:19:38 AM > Searching for a phone. Please wait…
INFO : 1/1/2002 3:19:58 AM > Found phone on COM58
INFO : 1/1/2002 3:19:58 AM > Sending loaders, please wait…
INFO : 1/1/2002 3:19:58 AM > Sending preloader…
INFO : 1/1/2002 3:20:01 AM > Preloader send successfully
INFO : 1/1/2002 3:20:01 AM > Sending mainloader…
INFO : 1/1/2002 3:20:41 AM > Mainloader send successfully
INFO : 1/1/2002 3:20:42 AM > Loader send successfuly.
INFO : 1/1/2002 3:20:42 AM > Reading phone unlock codes. It can take some time, please wait…
WARN : 1/1/2002 3:20:43 AM > Can’t get seed key
ERROR : 1/1/2002 3:20:44 AM > Read codes failed

INFO : 1/1/2002 3:20:44 AM > Performed by 2.3.8 software version