Are you getting cartridge puncture? If so, you probalby have to replace a seal ring or have an obstruction in the line. I had one that I jammed a cartridge in sideways once and I bent the needle ($20 gun so I threw it away). I don't know about Daisy, but Crossman owns Benjamin now, and I called them about a new seal and a windage screw, and they sent them free of charge.

You can make some neat little fishing depth charges out of those empty co2's btw.....