Crashes with 744-8

I continue to get CTD's with the 744-8 while on final approach to any airport default or addon in FSX.The event log in win 7 states it's a g3d.dll error which is a scenery problem but my PMDG MD11 and LDS 767 fly perfectly through out FSX with no errors at all.Again this only happens with the 744-8 and only on final approach.This is driving me nuts!Can anyone help?Sorry for the double post.AlexSystem Specs:Mainboard-EVGA x58 3x SLIGraphics-GeForce GTX 285 OCFUCPU-Intel i7 950 3.07ghz (oc-4.0ghz)MEM-OCZ DDR3(6GB)OS-Windows 7 Pro x64FS-FSX SP2Activesky AdvanceGround Environment X US/CanadaUltimate Terrain X EuropeMytraffic X LiteRadar Contact 4.3