There is an exclusivity provision in the Pennsylvania Workers Compensation Act that precludes you from suing your employer. You should discuss the matter with an experienced attorney if the matter hasn't been resolved yet.
DISCLAIMER: This post is intended as general information applicable only to the state of Pennsylvania and is personal in nature, not professional in nature. The information given is based strictly upon the facts provided. This post is not intended to create an attorney client relationship, or to provide any specific guarantee of confidentiality.