Problems with George Bush Intercontinental (KIAH)

[Proteus]

Would be strange as, like I said, I didn´t use a scenery for KIAH (in fact all of the airports within USA are the original ones supplied by FS 2004, I
only altered LSZH and EDDL, which both are located in europe).

I also couldn´t see any references to fake airports and the like in the NRST-List from the GPS. The next airports aside from KIAH and JFKH seemed to
be 5 nm away (which seems to be correct according to the map)