Not sure what you mean by "flightbeam" in the message subject, but it sounds like you don't have an updated AFCAD showing the new runways. Look for the file "kiad_washington_dulles_intl_v2_0.zip" by Allen Laughmiller on flightsim or avsim in their file library.
Here's some info about the file:
Airport: KIAD – Washington Dulles International Airport
Location: Dulles / Chantilly, Virginia USA
Airport Type: public
Version: 2.0 (2011-12-29)
Release Features: Excepting the main terminal buildings, this is a complete rebuild including the new runway1L/19R (with completed taxiways W2,W3, and W4), new signage, to-scale ramps and taxiways, enhanced executive aviation parking, cargo parking, and service roads.
Creator: Allen Laughmiller (c2fspro@gmail.com)
Hardware Requirements: fast multi-CPU system, high-end graphics card.
Disclaimer: Freeware, not to be sold or used for commercial or real-world flight planning purposes. No warranty express or implied.
Jerry