Descending in the 737 600 - 700 having trouble

Hi, I have been practising numerous flights using the FMC. All is well (actually great) except for descending. I have flown the flight in the FMC Manual from KIAD to KJFK with a RWY ILS1104R11 landing using a CAMRN4 approach. Beginning the descent at TOD is a very steep descent into KJFK. Is this real? I was expecting a gradual descent about 3 to 1. I find the 737 needs full speed brake and then I still overrun the airport by about 1500 - 2000 ft because at 10000ft it takes so long to wipe off the speed to 250kts. What am I missing in the manual? I am still to do a good ILS capture.Barry HARRISP4 1.7