When trying to identify the exact location of leaks, remember that the old leak finding tricks such as putting soapy water around joints can be a great help. Remember to use an appropriate oil. If you aren't sure what kind of oil is appropriate for a paintball marker, go to your local paintball retailer and get a bottle of oil from them. As an aside, lots of problems with markers can be prevented simply by keeping the marker clean. Then re-lubricate and your Sovereign should be ready to go next weekend.
Gas leaking through the front seal of the ram-bolt or the valve stem is dirty or malfunctioning.
First, squeeze the front urethane hose connected to the ram-bolt. Also check that the ram-bolt screw is not overtightened. If this is not the source of the leak, then the valve seal is dirty or malfunctioning. Place a few drops of oil in the ASA and cycle the gun a few times. If the leak stops, then your valve seal was dry.