m9+ s-off with adapter problem

1. Checking phone connectivity.......
Phone connection confirmed!
Requested card version not detected, version 6 will be used
2. Checking Server connectivity...
Server connection confirmed!
3. Checking PowerAdapter connectivity...
Process started
PowerAdapter connected, processing request to adapter...
Starting operation...
Sending oem writesecureflag 0
...
Building connection
Initiating communication
Building connection
Data exchange sequence.
Requesting information from server
Error: Server returned unexpected reply!
Data exchange completed
Data exchange sequence.
Initiating communicationFAILPERMISSION DENY (SIGNATURE_FAIL)
FAILED (remote: PERMISSION DENY (SIGNATURE_FAIL))
finished. total time: 46.917s
htc_fastboot finished
Operation completed!
Releasing adapter.
Request completed






is it server problem or what??