select gemmes i array

hvorfor virker dette ikke

<%
var CreditorArray;
var i=0;
var nystreng="selectCreditor "        //stored procd.
var rs=Conn.Execute(nystreng);
while(!rs.EOF){
CreditorArray(i) = rs("CreditorID")
i = i + 1
rs.MoveNext
}
%>


der skrives fejl i CreditorArray(i) = rs("CreditorID")

Object expected
/datmat/test/default.asp