Arduino cant read optical finger reader

I am new at this I have both a a adruino uno and mega 2560 I have down loaded a library form Ada enrolled put cant find scanner help would be great full

Really, that is all we get to go on? It is very difficult to help when we know so little about your project. We need specific information about the "scanner" and the library. We need to know how the scanner is connected to the Arduino (schematic). Also we will need to see your code.

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