GT511C1R

Hi im doing a proyect with arduino Mega2560 and the GT511C1R fingerprint, i have many libraries for this sensor but in all of them i have the same problem.

When i open the serial monitor, it shows me a message (the typical mesage with the program blink) and the led inside of the sensor isnt blink. I have read in many pages and download many libraries for GT511C3 and GT511C1R, and still the problem, please somebody help me.

Pdta: excuse for my english.

I am also facing same problem..

I am not able to enroll the fingers. I could control LED...