Lpc2000

I am having a problem with my real time clock. I can set it, but then
it does not ever move until it is set again. Below is the code used to
set it. I don't do anything else to activate it or turn it on. I
assume if we have hooked up the crystal correctly it will just take
off clocking. Is that correct or is there a register I need to change.

CCR = 0x10;
		
YEAR = year = setYear;
MONTH = month = setMonth;
DOM = dom = setDay;
DOW = dow = setDow;
HOUR = hour = setHour;
MIN = minute = setMinute;
SEC = second = setSecond;

isLeapYear = (!(year & 0x03));
DOY = doy = getDoy( year, month, dom );

CCR = 0x11;