New shooter to pistols here. I am trying to dry fire my S & W Model 659. I saw videos and it showed that I have to remove magazine and no round in chamber, which I did. I took it off safety and racked it back and then put safety on to de-cock it. Then I took it off safety and tried to dry fire and no trigger to pull. Tried to pull trigger back manually and no go. Then I tried to dry fire it without putting safety on and , no luck. I'm thinking it may be something simple, but can't figure out. Thanks.