Cumberland1:
Look at the icon on the desktop that you are using to start Receivables. Right-click on it, choose "Properties" and look at the "Target" field. You will almost cetainly see /uSYS (the "u" stands for "user").
If you are using AR 9.0, remove that whole string and save the changes. Then when you see the login screen, use your ID and put a check-mark on the option to remember.
If you are using AR 8.1, replace "SYS" with your own initials.