[USR-TC] User not in table!!!

Hello: I am testing a 3COM box and have setup a HiPer DSP. It answers the user dial-in calls. I watch the connections & delete those users who are logged in more than couple of hours. I use the following commands: Hiper>> list connections Hiper>> delete user xxxxx When I try to delete a user 'xxxxx', I get an error message: DELETE USER failed because the item is not in the table (or very similar message) I display the list again and sure enough the user is logged on. I have checked the user name but the error keeps on happening. What causes this error and how to fix it? Thanks in advance. Kirti