What am I doing wrong?

i'm building counter uses proximity sensor.  concept have sketch take base reading sensor , compare current reading baseline.  , when significant change increment counter.
my problem counter keeps incrementing tho isn't change?  not sure i'm doing wrong?

code: [select]

int sensorpin = 0;                 // analog pin used connect sharp sensor
int val = 0;                 // variable store values sensor(initially zero)
int count = 0;          //variable store count
int val2 =0;            //variable store current sensor reading
void setup()
{
serial.begin(9600);       // starts serial monitor
val = analogread(sensorpin);    // set base sensorr reading
}

void loop()
{
int val3 = val + 100;
serial.println(val);       //debugging
serial.println(val2);      //debugging
serial.println(val3);      //debugging
delay(10000);              //debugging
val2 = analogread(sensorpin);       // reads value of sharp sensor
if (val2 > val3 );
{
   count = (count++);
   serial.println(count);
}

delay(100);                    // wait time before printing next value
}





code: [select]

if (val2 > val3 );
that's you're doing wrong.
lose semicolon

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