Documentation

I'm trying to call the shell on a shared server using IIS 6.
'I create the shell object as such:
oShell = Server.CreateObject("Wscript.Shell")
Now, I'm trying nice some simple test scripts like:

oShell.Run "%ComSpec% /c nslookup " & strIPAddress & "" & logfile, 0 , True

but no matter what I do, I can't even get an error message!
First, is there any documentation on using the scripting shell on a server? I've been
googling for the past hour and have found zilch for docs.
Second, what server permissions are required to execute the shell?