g900t 5.1.1

[ 11/15/2015 12:29:00 AM ] Reading phone info...
[ 11/15/2015 12:29:00 AM ] Reading IMEI... OK
[ 11/15/2015 12:29:00 AM ] IMEI: 353300063681917
[ 11/15/2015 12:29:00 AM ] Reseting MSL security... error
[ 11/15/2015 12:29:00 AM ] Reseting... OK
[ 11/15/2015 12:29:00 AM ] Reset MSL done
[ 11/15/2015 12:29:00 AM ]
[ 11/15/2015 1:17:00 AM ] Operation: Unlock
[ 11/15/2015 1:17:00 AM ] Selected model: SM-G900T
[ 11/15/2015 1:17:00 AM ] Selected port: COM142 SAMSUNG Mobile USB Serial Port
[ 11/15/2015 1:17:00 AM ] Software version: 23.3
[ 11/15/2015 1:17:00 AM ]
[ 11/15/2015 1:17:00 AM ] Reading phone info...
[ 11/15/2015 1:17:00 AM ] Reading IMEI... OK
[ 11/15/2015 1:17:00 AM ] IMEI: 353300063681917
[ 11/15/2015 1:17:00 AM ] Reading security... new type
[ 11/15/2015 1:17:00 AM ] Bypassing... OK
[ 11/15/2015 1:17:00 AM ] Unlocking... error

I keep getting this error....I tried other boxes and none can unlock it. I thought z3x could? phone is even rooted but I keep getting this error. I downgraded z3x software but still same error

I'm I doing something wrong?

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g900t 5.1.1