FsX crashed immediately after flight deck appears on the screen

Need help from someone I installed the 737NGX basic pack as recommanded and also have modified the fsx.CFG as suggested. The 4 variants of the plane appears well in the airplanes menu. After my choice have loaded, FSX crashes immediately as the flight deck appears on the screen. I tried to reinstall whitout success. During the installation, at the end of the process, I had this message: " DirectX 9.0 Web Set up, Command line option syntax error, Type Command / ? for help" Can you help me with that, may be there is a relation with the crashing problem mentionned. ? I don't know what to do and want not take the risk to create more troubles in my system. CLAUDE MOFFETQuebec Windows7 64Intel i& cpu 860 @ 2.80 GHzRAM 8.00 GoATI Radeon HD 5800 SeriesFsx installed on D hard drive