WWW Publishing Service dies with event 7023

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From: Chuck Polisher (cpolish_at__surewest_._net_)
Date: 02/12/05 

Date: Sat, 12 Feb 2005 02:35:25 -0000

When attempting to start World Wide Web Publishing Service,
error 87: "the parameter is incorrect" is displayed,
and the system log shows event id 7023. Can anyone point
us in the right direction? This is a production server
and we're down.