Cloth not working correctly

I have made a war banner and applied the cloth and done all that good stuff. The problem that I am having is that when I put it in my level and play it all the banner does is bounce up and down even though I have the wind coming from the X. Another problem that is occurring is that when I try to make a Kactor interact with the cloth it just passes through it. I have sent the file to a friend and everything works just fine for them. I have even tried it in a blank level that just had a Builder brush, Player start, Kactor, and the banner and got the same results. Is there a UDK setting that I need to change so that I can see the interaction?