have you just bolted ab A15 into a formerly A12 powered vehicle? Which flywheel did you use? It's a common oversight to leave the A15 flywheel on when doing this swap. The A15's have a thicker flywheel, and need a different (shorter) throwout bearing carrier. If you have the wrong combo, the clutch fork might be bottoming out before it can get far enough foward to hook the clutch cable over. There's also not much room between the fork and the tunnel to get your hand into. Sometimes you can get a bit more room to work with by lowering the gearbox on a jack.