Can't delete archive data

Hi, I am trying to delete archive data from an AIX client (archives of
directories that got bound to the mgmt class with the longest retention
period, the old story), but I can't seem to do it.

Here's what I see and don't understand:

dsmc> q ar "/u03/temp"
             Size  Archive Date - Time    File - Expires on - Description
             ----  -------------------    -------------------------------
              512  04/28/99   12:44:13    /u03/temp 04/27/00   Archive Date:
04/28/99    Time: 12:46:06
              512  06/02/99   04:00:17    /u03/temp 06/01/00   Archive Date:
06/02/99    Time: 04:02:42
              512  06/03/99   04:00:31    /u03/temp 06/02/00   Archive Date:
06/03/99    Time: 04:02:58
              512  06/04/99   04:00:20    /u03/temp 06/03/00   Archive Date:
06/04/99    Time: 04:02:47
              512  06/05/99   04:00:19    /u03/temp 06/04/00   Archive Date:
06/05/99    Time: 04:02:46
              512  06/06/99   04:00:31    /u03/temp 06/05/00   Archive Date:
06/06/99    Time: 04:02:59
              512  06/07/99   04:00:05    /u03/temp 06/06/00   Archive Date:
06/07/99    Time: 04:02:34
              512  06/08/99   04:00:32    /u03/temp 06/07/00   Archive Date:
06/08/99    Time: 04:03:02
              512  06/09/99   04:00:13    /u03/temp 06/08/00   Archive Date:
06/09/99    Time: 04:02:43
              512  06/10/99   04:00:34    /u03/temp 06/09/00   Archive Date:
06/10/99    Time: 04:03:05
              512  06/11/99   04:06:13    /u03/temp 06/10/00   Archive Date:
06/11/99    Time: 04:08:44
              512  06/12/99   04:00:40    /u03/temp 06/11/00   Archive Date:
06/12/99    Time: 04:03:14
              512  06/13/99   04:00:36    /u03/temp 06/12/00   Archive Date:
06/13/99    Time: 04:03:11
              512  06/14/99   04:00:37    /u03/temp 06/13/00   Archive Date:
06/14/99    Time: 04:03:14
              512  06/15/99   04:01:41    /u03/temp 06/14/00   Archive Date:
06/15/99    Time: 04:04:17
              512  06/16/99   04:00:39    /u03/temp 06/15/00   Archive Date:
06/16/99    Time: 04:03:16
              512  06/17/99   04:00:58    /u03/temp 06/16/00   Archive Date:
06/17/99    Time: 04:03:35

So far, everything's cool. But when I try to delete something, using this
command:

dsmc> del ar "/u03/temp" -pick
ANS1092E No files matching search criteria were found

...I get this. Why?

Thanks in advance,
Martijn.