It happened to be Christmas weekend, so people have other things to do besides tech support. If you're impatient, you can just search for "SetDisplayMode" and all sorts of suggestions pop up from the last times people asked this question. It has to do with your video card/drivers. Make sure you upgrade those or try the game in 16 bit color. Also make sure there is just one installation of Secret Ops with one SO folder on your hard drive.