Frequency counter library problem

I want to read a sqaure wave comming out of an ic555 i am using the frequency counter library from there Page has moved but i am not getting any readings but displayed with the following screen in the arduino what could be the problem?

Your sketch sets the baud rate to 57600 but your serial monitor is set to 9600. Change you serial monitor to 57600 baud (bottom right corner).

thanks :) :) that was quick