My luger went full auto

[patrickoneal]

I was shooting my recently aquired luger yesterday and after some time it went full auto and fired two rounds and jammed before a third could be fired. I cleared the jam and dropped the magazine, and when I set the pistol down the sideplate fell off. Apparently my finger was on the take down lever when the gun was firing. I know that the side plate has some function with regard to the trigger. Is it likely that accidentally pressing the takedown lever caused it to go full auto after the side plate started to slip out? Do I need to check out some other parts or go to a gunsmith? I would like to shoot the pistol some more, but not like this.

Thanks,

Patrick