I did the repair using a heavy duty wall anchor....the type that has to be screwed into the wall with a Phillips head screw driver. There was no stud in the location I placed the anchor. I screwed in a long screw, let it stay out long enough to support the rung of the wire shelving and now the shelf is very stable.
I left the original "fastener nail" in the wall which is a couple of inches away and now it is not coming out of the wall because there is no more pressure on it. I know the original fastener is not really doing anything to support the shelf but i left it in for cosmetic purposes and not have to repair the wall if I pulled it out.
The reason I figured there was a stud behind the wall where I placed the anchor is because it was located at the end of the wall where this is an angle to it. Glad I got the job done.
Thanks again to all who have taken an interest in my plight and helped me along with my repair.
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