Lyman Case Trimmer help

[deadly0311]

Guys for the life of me i cannot figure out how to get my cases to not turn. Its Lymans basic case trimmer. No frills, but when i put the case in the holder it doesnt hold it tight enough to were the case wont spin. So i end up having to hold the case with my hand and turn the cutter at the same time. Any help you guys could offer would be great. Thanks