Plutonium

How do I do this?

For some reason, trying to move a pred missile around with my mouse does literally nothing to my missile and it ends up just falling ballistic. I've tried to look in the controls to figure out how to change this but i can't figure anything out. Some people in game tried helping but to no avail. If anyone has heard of this issue or knows any fix, please let me know. I'd love to get back to dropping warheads on foreheads.
-Broski