I just googled the words: Creative Drawing 5 Trimming and many sites came up, including some that have video tutorials. You might find how to solve your problem through one of these sites. Good Luck!
I don't know creative drawing, but what I do know is not every machine recognises that command. And if it does you have to make sure your machine is set to it, you usually have a choice.
Can't help sorry but moving you TTT
Sorry I can't help you as not familiar with this program. Is it an embroidery program? This post should take it back to page 1 so someone can help you.