I also use the Auto Soft XC. What I was told to do, is to remove the outer plastic, the "lid"and the bottom paper cover. Next, unwrap the tubing. Then cock the unit back. You will still have the paper lining on the adhesive patch, as well as the needle cover. This way, if the patch pulls up you can push it back into place without it sticking to your fingers. Carefully remove the paper from the adhesive patch, making sure not to pull the pack up. Remove the blue needle cover, and insert.

auto soft xc

Which infusion set are you using?

the trigger nechanism is the white insert i pull to cock the trigger

What "trigger mechanism"?