Did you do any soldering with the cartridge installed? If so, you might have a heat damaged cartridge. The key here should be the cartridge. That is what controls the flow of water. Check the O-rings and check the seats for damage and if they are in their proper place. Did you disassmble the cartridge at all? Lastly, have you installed the handle or knob and tried turning it? I'm not sure, but it may be possible that the stop that limits the travel of the knob/handle could be another cause if it is not installed properly. I think there should be a drawing included with that package what would help you identify the parts.
