ON 01-14-00 EMPLOYEE REPORTED THAT HE FELL AT A FLOOR DRAIN AND STATED THAT HE WAS NOT INJURED. HE CONTINUED TO WORK REGULAR UNTIL 02-18-00 WHEN HE INFORMED MANAGEMENT THAT HE WAS EXPERIENCING KNEE AND BACK PAIN FROM THE 01-14-00 INCIDENT. WENT TO DOCTOR 03-02-00 DID NOT TAKE OFF WEEK AS DOCTOR SUGGESTED. THIS EMPLOYEE HAD PREVIOUS NON WORK RELATED INJURY AND COMPANY WAITING ON POS