big problem no one help

bst dongle team
i hope all fine

i bought bst dongle 1 year ago
so i cant slove my problem
i cant use this dongle

Restarting ADB service … ok

Scanning devices … 1 found
dev[1]
Manufactory:
Model:
Hardware:
Mode: offline
offline
Your device is offline, try follow steps to solve this problem:
1. diable and re-enable your device USB debug
2. reboot your device
3. restart adb service
4. change a usb cable or usb port.
Detect 2 USB devices not install driver
Checking environment … failed
Device Info (MTP)
Model: SM-G925I
IMEI: 350000000000006
PDA Version: G925IDVU2COGA
Phone Version: G925IDVU2COGA
CSC : G925IKSA2COGA
CSC Version: G925IDVU2COGA

(( phone off line:confused::confused::confused::())