UV Light sensor not working

I have been trying to use a uv light sensor for the past 3 weeks but have not been able to successfully use the sensor. We used the following code
void setup()
{
Serial.begin (9600);// open serial port,
}

void loop()
{
float sensorValue;
sensorValue = (A0);
Serial.println(sensorValue);
delay(1000);
}
but the serial monitor only says 14 over and over again... the uv sensor is one that we bought from dfrobot. We first soddered single row of male pins to the sensor. and then used female male wires to connect it to arudino.
Please help we don't know what else to do!