Instructions for use DiLonghi StiroMeglio compact...

Question

Hi, I have the above iron and have never been able to use it I received it as a gift. I do no have instructions with it. I fill the boiler with water and the steam biulds up inside but I am unable to get the steam to go through to the iron. There is a button at thumb level on the the handle which I assumed would be held down or released for steam but no steam gets through the iron either way. I am afraid to leave the boiler on for too long so I give up trying after about five minutes after boil. Is there something I should be or should not be doing. Regards Elizabeth