THE EMPLOYEE WAS ASSISTING TWO OTHER EMPLOYEE TO SLIDE A LARGE COVER GUARD INTO PLACE ON THE BACK OF A TUNNEL DRYER. WHILE DOING THIS THE EMPLOYEE FELT A PAIN IN HIS BACK. HE DID NOT REPORT TO WORK ON THE NEXT DAY. EMPLOYEE ALSO INJURED HISBACK ON 08-08-98 AND WE BELIEVE THIS IS A RECURRENCE OF A CHRONIC BACK PROBLEM.