Remote filtering values are not applied to grid when Nested ajax call is added with existing HttpProxy

Question

for Remote filtering ,whenever i click for filter/sort, Forms.asp triggers using proxy,and automaticlly reloaded
earlier when i tried below script, to reload the extjs grid with Forms.asp returning new xml with filtered grid data, it was working fine.

var gridStore = new Ext.data.Store({
            gridId  :'d_grid',
            reader: new Ext.data.XmlReader({ record: etc }, etc etc),
            proxy: new Ext.data.HttpProxy({ url: "Forms.asp?", 
            timeout: 120000 }),
            baseParams:{
                XML:$$("XML").value,                                
                some more params                
            },          
            data: doc,
            remoteSort: true});

but when i tried to modify it with some WCF call like:

var gridStore = new Ext.data.Store({
                gridId  :'d_grid',
                reader: new Ext.data.XmlReader({ record: etc }, etc etc),
                proxy: new Ext.data.HttpProxy({ url: "Forms.asp?", 
                timeout: 120000  ,

            success: function (response) {
                FilterXml = response.responseText;

                created new XmlDoc= with somechanges(FilterXml)

                Ext.Ajax.request({
                             method: 'POST',
                             url:'/mayo/Service.svc/GetnewXML',
                             params: {'strIPXML': XmlDoc.xml}});
            }}),
                baseParams:{
                    XML:$$("XML").value,                                
                    some more params                
                },          
                data: doc,
                remoteSort: true});

here i am catching the response of earlier asp, and to further modify it sending it to a web service, with new added ajax returning the same formatted xml as returned in above case (checked using success: function{ alert etc}),

but "The new xml is not feeded to the grid , as it was feeding in above case"
no errors are thrown..
using extjs 3.4
please help

Answer 1

Solved after much reading, Problem was , i thought, ajax will reload data using the store.load , used by HttpProxy,after uch reading and hustle i got tht it might not work for ajax, so now i used store.loaddata and it worked.

var gridStore = new Ext.data.Store({
                gridId  :'d_grid',
                reader: new Ext.data.XmlReader({ record: etc }, etc etc),
                proxy: new Ext.data.HttpProxy({ url: "Forms.asp?", 
                timeout: 120000  ,

            success: function (response) {
                FilterXml = response.responseText;

                created new XmlDoc= with somechanges(FilterXml)

                Ext.Ajax.request({
                             method: 'POST',
                             url:'/mayo/Service.svc/GetnewXML',
                             params: {'strIPXML': XmlDoc.xml}

                             success: function (response) {
                                                FormXML = PC.getXmlStr(response.responseXML);
                                                doc = OrchGenericObj.GetXMLObj(FormXML, 0);
                                                Ext.getCmp('dashboard_gd').store.loadData(doc);
                            }    });
            }}),
                baseParams:{
                    XML:$$("XML").value,                                
                    some more params                
                },          
                data: doc,
                remoteSort: true});