Spray Modes, only basic 4 modes available?

I have had my new Shower(L16J) for two months now but I can only get the four basic spray modes from the shower head. I have tried clicking once as advised on yourleaflet each time I shower but can not get the "Saturate", "Soak", "Soothe" or "Stimulate" modes at all. Is my shower head faulty?