Help on Windows Linux

Though a member for quite a while, I have never asked a question before. If anyone can "spoon feed me" as to why "compiz" is not working. It keeps saying: "Fatal no composite extension". I keep looking at websites and they all basically give the same instructions, but I seem to be doing something incorrectly and do not know what. I run "Xming", I check "ccsm", I export the Display port, but it keeps indicating "Fatal" on Composite extension. Help is appreciated.

Zordos