When I went riding last I had a sudden disappearance front brake. I figured I had moisture in the lines because I used DOT 3 the last time I blead my brakes. I bought some Dot 5 this time and proceeded to bleed the system. After about two or more hours of this I have given up for the night. I tried the normal methed. I tried the gravity methed. I tried to elevate the caliper above the master. I even tried to force air out by using a bottle full of fluid at the caliper. I always get the same results, I pump the brake lever, hold it in, open the bleeder and nothing comes out. I have no resistance in the lever at all untill I get to about 50 pumps, and even then the lever still pulls in all they way. I thought the the master may be bad but it seems to be working fine. If I put my finger over the hole in the resivor and pull the lever it has a ton of force. Also if I open the bleeder first and then pull the brake lever fluid will squirt out fine. What the hell is going on. There cant be any air left in that line I ran a full bottle of fluid throught it. Something has to be broken some place but I have no idea what or how to check for it. Please help.