Wil, the only error wasn't just the missing ! so you must have changed what CP and myself suggested too about the missing ' ' or " "

The file names would have caused errors the way you had them

As this shows:

Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 12, near "index."
Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 13, near "index."
Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 14, near "index."
Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 15, near "index."
Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 16, near "index."
Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 17, near "index."
Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 18, near "index."
Not enough arguments for index at e:\apache\cgi-bin\du.cgi line 19, near "index."