PMDG 747-400 With IFR flight set-up

hello you lot 🙂 id like some help if someone knows how to..
when i set up a flight using the PMDG 747-400, i select and fill in the IFR flight plan on the main setup page, then go into the flight, then load the FMC, but after take-off, is there a way to still get asent and decent instructions from ATC without telling me to turn left onto a heading thats far out of the way of whats programmed in the FMC, because its anoying now..

thank you for reading, and ill be waiting for some usefull help 🙂
happy flying guys