Unlock G950fd not success, but loss Credit

[ 3/23/2018 2:20:00 PM ] Operation: Read Codes via Server
[ 3/23/2018 2:20:00 PM ] Selected model: SM-G950F
[ 3/23/2018 2:20:00 PM ] Software version: 31.0
[ 3/23/2018 2:20:00 PM ]
[ 3/23/2018 2:20:00 PM ] Checking Login and Password... OK
[ 3/23/2018 2:20:00 PM ] Ballance: 10 crd.
[ 3/23/2018 2:20:00 PM ] You have 10 credit(s) left. This operation takes 5 credits.Continue? Yes
[ 3/23/2018 2:20:00 PM ] Searching Samsung modem... detected COM231
[ 3/23/2018 2:20:00 PM ] Reading phone info... OK
[ 3/23/2018 2:20:00 PM ] Model: SM-G950FD
[ 3/23/2018 2:20:00 PM ] AP version: G950FXXU1AQK7
[ 3/23/2018 2:20:00 PM ] CSC version: G950FOXM1AQK7
[ 3/23/2018 2:20:00 PM ] CP version: G950FXXU1AQK7
[ 3/23/2018 2:20:00 PM ] Product code: MID
[ 3/23/2018 2:20:00 PM ] Phone SN: RF8JB0QKF8Z
[ 3/23/2018 2:20:00 PM ] Unique number: 988A16454948345935
[ 3/23/2018 2:20:00 PM ] Incorrect model selected. This may damage your phone. Continue? Yes
[ 3/23/2018 2:20:00 PM ] Searching Samsung diag port... detected COM230
[ 3/23/2018 2:20:00 PM ] Reading phone info... OK
[ 3/23/2018 2:20:00 PM ] CP version: G950FXXU1AQK7
[ 3/23/2018 2:20:00 PM ] CP build: Nov 20 2017 16:23:02
[ 3/23/2018 2:20:00 PM ] Reading data from phone... OK
[ 3/23/2018 2:21:00 PM ] Calculating... OK
[ 3/23/2018 2:21:00 PM ] Searching server... error
[ 3/23/2018 2:21:00 PM ] could not connect to server




[ 3/23/2018 2:22:00 PM ] Operation: Info
[ 3/23/2018 2:22:00 PM ] Selected model: SM-G950F
[ 3/23/2018 2:22:00 PM ] Software version: 31.0
[ 3/23/2018 2:22:00 PM ]
[ 3/23/2018 2:22:00 PM ] Searching Samsung modem... detected COM231
[ 3/23/2018 2:22:00 PM ] Reading phone info... OK
[ 3/23/2018 2:22:00 PM ] Model: SM-G950FD
[ 3/23/2018 2:22:00 PM ] AP version: G950FXXU1AQK7
[ 3/23/2018 2:22:00 PM ] CSC version: G950FOXM1AQK7
[ 3/23/2018 2:22:00 PM ] CP version: G950FXXU1AQK7
[ 3/23/2018 2:22:00 PM ] Product code: MID
[ 3/23/2018 2:22:00 PM ] Phone SN: RF8JB0QKF8Z
[ 3/23/2018 2:22:00 PM ] Unique number: 988A16454948345935
[ 3/23/2018 2:22:00 PM ] Reading IMEI... OK
[ 3/23/2018 2:22:00 PM ] IMEI: 359623086713936 (SIGN: OK)
[ 3/23/2018 2:22:00 PM ] IMEI 2: 359624086713934 (SIGN: OK)
[ 3/23/2018 2:22:00 PM ]
[ 3/23/2018 2:22:00 PM ] Operation: Read Codes via Server
[ 3/23/2018 2:22:00 PM ] Selected model: SM-G950F
[ 3/23/2018 2:22:00 PM ] Software version: 31.0
[ 3/23/2018 2:22:00 PM ]
[ 3/23/2018 2:22:00 PM ] Checking Login and Password... OK
[ 3/23/2018 2:22:00 PM ] Ballance: 5 crd.
[ 3/23/2018 2:22:00 PM ] You have 5 credit(s) left. This operation takes 5 credits.Continue? No

How to fix it?...