I wanted to clean my SW40VE, I received a call and had to leave. I carefully put it together after slightly cleaning it and put it away. When coming home after work, I wanted to completely clean it. So, I pulled back on my slide, pulled down the release on the front, and the slide moves forward about a half inch and stops. Will not allow me to glide it off as in the past. Can anyone please help? I want to make sure it's still in proper working order and it needs to be properly cleaned. Any help would be greatly appreciated

Yes, I have tried dry firing it and trying again. I tried pull it all the way back and dry firing. I just need help to draw it off so it can be properly cared for. Please help