FSX MD-11 Pause at TOD

Greetings PMDG enthusiasts! I can't seem to get my MD-11 to pause at the top of descent . When I come back to check on it The plane has gone right by and continued on at the same altritude. Therefore my second problem is my flights are not following the STARs correctly. They seem to get confused about the altitude, can't find the ILS and break away from the flight plan. Any tips on how to set the combination to get it to pause/stop before descending would be great!Don Filer