help my x500

[winson300]

i want unlock the phone is shows............
COM8 selected
Device must be POWERED-ON !
Connecting, wait...
Err: [A02]
Err: [A02]
Err: IMEI read
Err: Device not powered or bad connection:
why can't my inifinty box connect? it always shows error
use com port? usb port?

[InfinitySupport]

Phone must be in power-on state.
Connect cable to left RJ45.
When you press "Unlock" button you have to see that box LEDs become blink.