Need to see your system specs.
It might be due to your GPU(Graphics card or on-board).
Hi,
I have FSX Delux and FSX accelerator install and here are my spec. from Belarc.
Windows XP Home Edition Service Pack 3 (build 2600)
2,20 gigahertz AMD Athlon 64
256 kilobyte primary memory cache
2048 kilobyte secondary memory cache
64-bit ready
Not hyper-threaded
Board: MSI AMETHYST-M 1.0
Bus Clock: 200 megahertz
BIOS: Phoenix Technologies, LTD 3.47 03/03/2006
3328 Megabytes Usable Installed Memory
c: (NTFS on drive 0) 1000,19 GB 785,87 GB free
d: (NTFS on drive 1) 293,59 GB 129,71 GB free
e: (NTFS on drive 6) 160,04 GB 104,51 GB free
NVIDIA GeForce 9600 GT [Display adapter]
Samsung S/M 1100p+ [Monitor] (19,7"vis, s/n H3NRB02269, november 2001)
Standardbildsk