If you put the slide back on with the disassembly lever not in the upward position and the slide is stuck to the rear then Springfield suggests rapping the rear of the slide with a rubber mallet to move it forward according to one web site.
Before I go telling you to beat on your gun I would suggest that you call Springfield and talk to one of their smiths on the phone.
I'm really not that up on the XD.
Below Sounds Better.
