Normally those things lock in to the door so tightly they are destroyed taking the door card off. I consider them single-use, which is quite annoying when you forget to attach the bowden cable, but such is life. Still, I order a thousand at a time from Tradition so I just grab a handful more and try again
Is it all the clips not holding in, or just a couple? I've seen a couple of times where the ones at the top corners don't lock in fully, but all the others do.