I purchased a 22cal conversion kit for my pre B CZ 75. It will fire some of the time and other times I have to keep pulling the trigger to get it to fire. This gun is double action. There are times I can fire off 6 rounds and then nothing. I have to pull back on the slide, eject the shell and try again. I would have thought that the conversion kit would be as reliable as a regular 22 hand gun. I also tried different ammo (Federal, CCI high power and Remington) they all malfunction. What gives?