There may not be enough water in the water tank or it is not properly placed in the water tank compartment. Fill the water tank and put it back into the water tank compartment properly.
The appliance may not be hot enough for steaming. Heating up takes two minutes. Wait until the light on the iron/steamer stops blinking and starts burning continuously. Then press the steam activator to start steaming.
You may not have pressed the steam activator. Press the steam activator on the handle of the iron/steamer to start steaming.