After reading
RobsImprza00 posts here
http://www.thefiringline.com/forums/...d.php?t=343380 it appears that his gun is missing the essential parts to properly function as a semi-auto. It was built as a straight pull from the description in the thread above.
I would try Ruger to see if they can convert it to a normal semi-auto configuration. Failing that, see if the seller will take it back as you were under the impression you were purchasing a semi-auto and not a manual straight pull.
If that does not work, see about selling it as a collectors item. I am sure someone will want it.