AGS call via HTML

Hi,

I'm working on a custom HTML page which extracts Invoices to be released for a Vendor Class based on user's login info. I get as far as DME query displaying all the unreleased Invoices. Upon selecting the desired Invoice, the following AGS call gets created but doesn't post.


function AGSCall(vAuthCode, vVendor, vInvoice)
{
var o = new ActiveXObject("Microsoft.XMLHTTP");

var s = "http://Servername:port/servlet/Router/Transaction/Erp?_PDL=PDLname"
+ "&_TKN=AP26.1&_LFN=ALL&_EVT=CHG&_RTN=DATA&_TDS=IGNORE&_OUT=XML&FC=C"
+ "&API-COMPANY=000"
+ "&PT-API-AUTH-CODE=" + vAuthCode
+ "&LINE-FCr1=R"
+ "&API-AUTH-CODEr1=" + vAuthCode
+ "&API-VENDORr1=" + vVendor
+ "&API-INVOICEr1="+ vInvoice
+ "&_EOT=TRUE"

objhttp.Open("POST", s, false);
objhttp.Send();
objhttp.responseTEXT();
DMECall(); // This call repopulates the page
}

responseText retrieves "Invoice not found" message. But if I check thru Portal, this Invoice does exist and am able to release it within the portal window logged in as the same user.

If I invoke the DMECall subroutine listed below, this works fine.
function DMECall()
{
var o = new ActiveXObject("Microsoft.XMLHTTP");

var o = document.getElementById('lstVenClass'); //Select box
vSelected = o.options[o.selectedIndex].text;

var s = "http://Servername:port/servlet/Router/Transaction/Erp?_PDL=PDLname&FILE=APINVOICE&FIELD=VENDOR;DESCRIPTION;INVOICE;BASE- ACT-AMT;APVENMAST.VENDOR-VNAME;AUTH-CODE;&SELECT=REC-STATUS^%3D0%26OUT-BAL-FLAG^%3D%26COMPANY^%3D000%26AUTH-CODE^%3D" +vSelected + "&OUT=XML"

objhttp.Open("GET", s, false);
objhttp.Send();

Recs = objhttp.responsexml.getElementsByTagName('RECORD');
removeRowFromTable();
addRowToTable(Recs);
}

Appreciate any help on this and thanks in advance.