The 200 ohm is the error, and yes, you must use the sense output. If you don't need to sense the current through the motor you must connect sense (pin 1) to ground. If you want to sense the current use 0.1 ohm resistor. The 200 ohm you use is in series to the motor and limits the current to 25mA it is not enough to turn the motor.
As shortbus said you need 5V at pin 9 , the voltage to the motor at pin 4 can go down to 2.5V. If you connect 3 to 6V to both pins it might work too, just try it.
BTW if you enjoy reading the datasheet your circuit will work better.