I just received a CZ 75BD I bought from a gunshop, after a hellish week long wait. I took it to the range and fired a couple of boxes worth of ammo without any issues. It's accurate, it fits my hand like a glove and I love how it looks. However, the decocking lever doesn't work. I press it and nothing happens. Is this a common problem? I'm not experienced with semiautos, so it might very well be something simple that I haven't figured out yet.