I have a 908 purchased in July 2008 new;shot it 300 rounds right off to acquaint myself and had no problems. Have been carrying it daily and decided to shoot it last weekend. EVERY bullet jammed--Winchester target loads. After 20 rounds, decided it needed to be cleaned. . . I got it apart, cleaned alot of fouling and debris and now I cannot get it back together. When I put it on the rails it only goes back to about halfway--I have been putting the plastic spring device in the notch and trying to assemble it upside down. What am I doing wrong?