Granting permissions to IUSR_MachineName

I'm trying to save new files in a directory located on an NT 4.0 server from an ASP page, but I'm getting "Access Denied" error. So, I granted CHANGE permission to IUSR_MyServer on that directory, and it still doesn't work. I have tried both ways - in DOS and in Windows (below).

Here's the command line in DOS:
C:\>cacls C:\PublicAccess /E /G IUSR_MyServer:C

the system returned: "Processed c:\PublicAcess"

The command line is from this site:
http://www.web-hosting.com/support/nt/permissions.html

Here are the steps for Windows:
1. Right click the directory where the guestbook is located
2. Choose Sharing
3. Click on the Security tab
4. Click on the Permissions button
5. Add the IUSR account
6. Assign the IUSR account Change permissions
7. Click on Ok, then OK again.

The steps are from this site:
http://www.web-savant.com/users/kath...guestbook.html


After each change, I tried, and it still returned "Access Denied" error...

Does anybody have any idea what I missed? or what I'm doing wrong?

THANKS!



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