I purchased a new Wisdom computer. I mailed in the Product Registration to the preprinted address. I just received it back in the mail with a sticker that says, "Return to sender Attempted not known Unable to Forward". So, my question is, is this a post office slip, is the address incorrect on your preprinted registration forms or something else? BTW the address is: P.O. Box 1516 Bellmawr, NJ 08099.