On Mon, 2 Aug 1999 23:04:05 -0400, Peacenet Balkans Desk <[log in to unmask]>
wrote:

>My list was just moved from one server to another, both running ver. 1.8d.
>
>On the previous server passive probing worked fine. But when I try to write
>,Probe(n) into Auto-Delete= on the new server, I get an "invalid parameter
>value" error msg, and LISTSERV rejects the change.

Sounds like they are not running the final release version.  

Send the 2 commands
SHOW VERSION   (which should say 1.8d)
SHOW LICENSE   (check the build-date, must be Feb26 1999 or later)