k3772-z unlock error

[rifmann]

pls help me

2:50:11.140 Unlock procedure started!

Connecting to server... failed!
Reading modem IMEI... OK
Disabling modem CDROM... OK
Switching modem port mode... OK
Reading modem port mode... OK
Reading modem secure data... OK
Connecting to server... failed!
Connecting to server... OK
Send data to server... OK
Read data from server...
Disconnected from server!

12:50:18.984 Error!

Error code = 248





Account status:
User: 00009+++
Credits left: 2

Activated features:
DC-Unlocker
Huawei CDMA modem unlocker
ZTE Icera UNLIMITED direct unlock

Please select model, to get additional information!

[rifmann]

13:15:39.296 Unlock procedure started!

Connecting to server... OK
Reading modem IMEI... OK
Disabling modem CDROM... OK
Switching modem port mode... OK
Send data to server... OK
Read data from server... OK
Reading modem port mode... OK
Reading modem secure data... OK
Unlocking... failed!
Send data to server... OK
Read data from server... OK
Switching modem port mode... failed!
Send data to server... OK
Read data from server... OK
Disconnected from server!

13:15:52.171 Error!

Error code = 22

[Valdemaras]

Reconnect modem to another usb port on pc, directly, without any usb hubs or usb cable extensions. Also there can not be other modems or phones connected to pc.