[Plextalk] new to Plextalk Pocket

I have just got a Plextalk Pocket. Having pressed the stop button, if I don't resume play within about a minute, then I find that which ever key I press, the unit first gives me the time and I have two re-press the button a second time in order to get it to do its normal function. I thought that the date should only be spoken when pressing 5. How can I correct this? Steve