Biometric FIngerprint sensor With SFG DEM0 2.0

i am trying to connect my arduino COM 4 with this software but every time i get the same error " OPEN DEVICE FAIL , CHECK PASSWORD AND DEVICE ADDRESS". PLEASE help me.

PLEASE help me.

How is this even remotely an Arduino problem? You have some application whose only relationship to Arduino is that it is remotely possible that there is an Arduino on the other end of the serial port that it is trying to talk to.

It is that application that is failing to open the serial port. Take that up with the people that you got that application from. It is NOT an Arduino problem.