[MTUSUPPORT]

I think you are running into the 16 bit problem. What you must do is open your Display settings, and change the colors to 16bit instead of 24bit or 32bit.

You do this by Right clicking on the Desktop, where there is no Icon, then left click the Properties button.

Left click the Settings Tab, then change the colors on this tab to 16 bit.

Now try Exporting the file again and see what happens.