I'm not sure I understand what you did. Is this a case where the blade exists but is covered up by the handles somehow hence inaccessible? Which model? Inquiring minds want to know.
SAK Evo Grip 14.
The bottle opener/screwdriver blade is supposed to lock when you put pressure on a screw, and unlock when you take the pressure off.
Mine was stuck and wouldn't lock. It opened and closed properly. Using the pliers to press in on that blade after opening it (like I was putting pressure on a screw), and some oil I managed to free it so it locks and unlocks properly.