I just got a PPK/S last week, and after 4 hours of trying, I can't get the slide to lift off. I've looked over the vague field stripping instructions and though it doesn't say that the safety lever has to be engaged, the pictures look like it, however even when trying it that way I can't get it off. I've even tried putting the gun in a vice and using both hands to pull the slide back and up, but it just won't go up. I'm going to call Walther tommorrow and see if they can do something about it. Has anyone else ever had this problem before?