Have you tried updating these values to use the upload object instead like this:
WA_DFP_UploadObj.Form
<%
var Recordset1__MMColParam = "77";
if (String(WA_DFP_UploadObj.Form("MM_EmptyValue")) != "undefined" &&
String(WA_DFP_UploadObj.Form("MM_EmptyValue")) != "") {
Recordset1__MMColParam = String(WA_DFP_UploadObj.Form("MM_EmptyValue"));
}
%>
If the value comes from the querystring then you may need to update the code to reflect that.
Request.QueryString