Problems with Manycam Chroma key- newbie here

This is what I get when I try adding a backround picture. What might be causing this/ please assist

Many, many thanks

Hi there! I can see that the color gauge to select the range of colors to chroma (below shrink contour) is selecting too many colors, is filtering from violet to almost blue. This creates a chroma including different shades of pink, red, yellow, green and blue. You can shrink the colors you want to filter moving the points inside the color selector, try to avoid walls and fabrics that are similar to your skin color. Usually Green and blue colors are the best.