Anyone know how to prevent this type mismatch error?

[RGould8 at aol.com]

Ahhh - - - perhaps that's the problem.   I was looking for an Applescript 
solution in OS 8/9 that would set the user's networking to DHCP.   So, if 
this was designed to run in 10, then that sheds some light on the issue.

In the long-run, I'll need to do this on both Mac OS 9 _and_ Mac OS X.   I 
was assuming that the technique would be radically different, with OS X 
relying on more unix-calls.   Resources on the web that detail how to script 
the networking control pane are few and far between, it seems.