Make sure that IIS has the directory/virtual path where your IDC files are
located, have execute rights as well as read. This is in IIS Manager --
not NTFS... (though you may need to check them as well).
Also you may want to give read permissions to specific columns in your SQL
tables (that are related to your IDC file) to IUSR_MACHINENAME. DON'T give
that user read permissions to the whole table--just the specific column
names. This is how I got mine running. The one I use is different from
"emeraldonline.idc", though it was based on it.