PNPFLIPPED

I HAVE A B16A ON MY 97 HONDA CIVIC COUPE AND I HAVE THE B16A TRANNY WHICH HAPPENDS TO BE A CABLE TRANNY AND MY CAR IS HYDRAULIC. I BOUGHT A HYDRAULIC TO CABLE ADAPTER FROM HASPORT... MY CARS BEEN FINE FOR LIKE 4 MONTHS BUT NOW.... I HAVE TO TAKE MY CAR AT LOW RPMS CAUSE ITS LIKE IF I LOOSE MY CLUTH PRESSURE COMPLETELY AT HIGH RPMS.. U CAN SHIFT SHORT AND ITS FINE BUT ANY HIGH SHIFT REQUIRED ME TO PULL UP THE PEDAL WITH MY FOOT... I CHANGED THE SLAVE CYLINDER AND IT STILL DOES IT.. IM WONDERING IF ITS THE MASTER OR THROWOUT BEARING. ANY HELP ID APPRECIATE THANKS! HELP PLZ!! CAN MY MASTER CYLINDER BE BAD? HOW CAN I TELL?