problem with json parse

Hi, I have some problem when i'm parsing the data . Actually my json response is like this

response {
    "count": 14,
    "casestudies": [{
        "CSID": "3",
        "CaseStudyName": "testingwebservicesave",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "4",
        "CaseStudyName": "testingwebservicesave",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "5",
        "CaseStudyName": "testingwebservicesave",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "7",
        "CaseStudyName": "21321432435",
        "CS_Image": "1406111920020.jpg",
        "CreatorUserName": "CreatorUserName"
    }, {
        "CSID": "8",
        "CaseStudyName": "21321432435",
        "CS_Image": "1406112088498.jpg",
        "CreatorUserName": "CreatorUserName"
    }, {
        "CSID": "9",
        "CaseStudyName": "21321432435",
        "CS_Image": "CS_Image",
        "CreatorUserName": "CreatorUserName"
    }, {
        "CSID": "10",
        "CaseStudyName": "testingwebservicesave",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "11",
        "CaseStudyName": "testingwebservicesave",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "12",
        "CaseStudyName": "testingwebservicesave",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "13",
        "CaseStudyName": "testingwebservicesave",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "14",
        "CaseStudyName": "testingwebservicesave3",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "15",
        "CaseStudyName": "testingwebservicesave4",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "16",
        "CaseStudyName": "testingwebse4",
        "CS_Image": "testingwebservicesave",
        "CreatorUserName": "testingwebservicesave"
    }, {
        "CSID": "17",
        "CaseStudyName": "testing",
        "CS_Image": "tesdt",
        "CreatorUserName": "tester"
    }]
}

And I wrote the code like this to get the key "" CaseStudyName".

var xhr = Titanium.Network.createHTTPClient();
xhr.onload = function(e) {
    // this is where you would process the returned object.
    if (this.responseText != null) {
        var jsObj = JSON.parse(this.responseText);
        // Do something with the object
 
 
         Ti.API.info("jsObj"+ jsObj.count);
        var APIResponder = jsObj[0][1] ;
 
 
    for(var i=0; i<jsObj.count; i++){
        var sugessionfighter = jsObj.response.data[i];
         Ti.API.info("reshfghfponse"+sugessionfighter);
 
    }
 
    } else {
       // Webservice returned nothing
        Ti.API.info("Webservice returned nothing");
    }
};
 
xhr.onerror = function(e) {
    // This is where you would catch any errors thrown from calling the webservice. 
    // e.error holds the error message
    alert(e.error);
};
 
xhr.open('POST', url);
xhr.setRequestHeader('Content-Type', "application/json; charset=utf-8");
xhr.send();

It's throuwing error to me can one guide me please. where I'm doing wrong