AGS error not displaying

I have an AGS call to update a custom form. The form works with no problem. But when I have it in another form and trying to use an AGS call to add a record - it doesn't work. So I added some additional code to check the error after the call. The alert comes back with "undefined" for the value of sReturnStatus. Here is my code:

       // add new record
        //Construct DME string for adding record
    agsCall = portalWnd.AGSPath + "?_PDL=" + strPDL
        agsCall += "&_TKN=XH01.1&_LFN=ALL&_RTN=DATA&_TDS=IGNORE&_OUT=XML&_EVT=ADD&FC=A"
    agsCall += "&XPA-COMPANY=" + aRecs[0]
        agsCall += "&XPA-EMPLOYEE=" + vEmpNo
        agsCall += "&XPA-TSPC-ACCT-ID=" + aRecs[2]
        agsCall += "&XPA-SEQUENCE-NO=" + aRecs[3]
        agsCall += "&XPA-FIRST-NAME=" + aRecs[4]
        agsCall += "&XPA-MIDDLE-NAME=" + aRecs[5]
        agsCall += "&XPA-LAST-NAME=" + aRecs[6]
        agsCall += "&XPA-NAME-SUFFIX=" + aRecs[7]
        agsCall += "&XPA-SSN-LAST-4=" + aRecs[8]
        agsCall += "&XPA-BIRTHDAY=" + aRecs[9]
        agsCall += "&XPA-LICENSE-CAT=" + aRecs[10]
        agsCall += "&XPA-LICENSE-TYPE=" + aRecs[11]
        agsCall += "&XPA-STATUS=" + aRecs[12]
        agsCall += "&XPA-CERTIFICATE-NO=" + aRecs[13]
        agsCall += "&XPA-LICENSE-EFF-DT=" + aRecs[14]
        agsCall += "&XPA-LICENSE-EXP-DT=" + aRecs[15]
        agsCall += "&XPA-LIC-RESTRICTN=" + aRecs[16]
        agsCall += "&XPA-ENDORSMNT-DESC=" + aRecs[17]
        agsCall += "&XPA-AUTHORIZ-LVL=" + aRecs[18]
        agsCall += "&XPA-AUTHORIZ-LV-CD=" + aRecs[19]
        agsCall += "&XPA-ENDORSE-EFF-DT=" + aRecs[20]
        agsCall += "&XPA-ENDORSE-EXP-DT=" + aRecs[21]
        agsCall += "&XPA-COND-ASGN-CODE=" + aRecs[22]
        agsCall += "&XPA-AS-OF-DATE=" + aRecs[23]
        agsCall += "&_EOT=TRUE"   
       
    var sReturn = portalWnd.httpRequest(agsCall)   
    var sReturnStatus = sReturn.status

        alert(sReturnStatus)