Ext.Ajax.request not working on IE

Hi..Need help with this block of code...

Code:

        var postData = {};        postData.csrfi = csrfi;        postData.data   = Ext.JSON.encode(quotations);                Ext.Ajax.on('beforerequest', function(conn, options){            //console.log(conn, options);        });                Ext.Ajax.request({            url:        UrlGenerator.getControllerActionUrl('RfqSE', 'sendQuotations', { media: 'json'} ),            params: postData,            callback: function(options, success, response) {                var showErrorMsg    = true;                                if (success) {                    var obj = Ext.decode(response.responseText);                    if (obj && obj.success === true) {                        showErrorMsg = false;                    }                }                if (showErrorMsg) {                    Ext.Msg.alert("{{#error_title##}", "{{#error#}}");                }                callback.call();            }        });

...for some reason params are not sent to the server side... it's not working on ie 7,8... Haven't tried 9+.. On chrome and mozilla works as excepted.... Url is fine, checked on chrome, params are fine.. Have no idea actually what is wrong... pls help