Recharge problem Greenstar 30 cdi?

Hi, When the boiler was fitted I was told I could leave the recharge key in the boiler to save having to fit and remove it to repressurise the system. I have however not needed to repressurise until now. I tried to do it today with the key in the locked position but water came out of the central part of the key. I may have over turned the key? Is this possible? I also do not seem to be able to remove the key when in the unlocked position, it appears to be stuck, could it be broken? Any advice greatfully received. I have a week old baby so do not want the heating to fail.