sm-g930a cant unlock

Reading phone info...
Model: SAMSUNG-SM-G930A
Android version: 6.0.1
PDA version: G930AUCS4APK1
CSC version: G930AATT4APK1
Phone version: G930AUCS4APK1
Product code: SM-G930AZDAATT
CSC country code: USA
CSC sales code: ATT
Phone SN: R38H30L9CMX
IMEI: 355502072067347
HW version: REV0.6
RF cal date: 2016.03.16
Chip name: MSM8996
Modem board: MSM8996
Security patch: 2016-11-01
Boot Warranty bit: 0
Waiting for device to become ready... OK
Initialization zTool... OK
Running zTool, please wait...
Start... OK
Initialization... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data from phone... OK
Searching Ramdump interface... COM49 detected
Reading data from phone... OK
Calculating... OK
Searching server... OK
Waiting for server answer... error (1)

Done with Samsung Tool PRO v.33.2


try flash phone with 7.0 G930AUCS4BQE1

same

server down?