Castle Net20/21 + Autosense

I recently re-installed a Castle Net20/21 (not sure which it is)
and had no end of problems with it. The previous attempt, was
recorded in the thread !InetSetup - where?
<0070-2-0.20060917.185528.61@xxxxxxxxxxxx> in Sept. 2006
Anway, this time I discovered that all the problems went away if
I ran BootResources:Configure.!InetSetup.AutoSense.FindEtherY
manually, so I have inserted a line in SetUpNet (in PreDesk)
to run it at boot.
But this puzzles me - I thought this AutoSense file was only
needed at set-up and, if not, why wasn't it being run?

--
Stewart Goldwater
http://janusg.co.nr
.