uploading doc using angularjs and spring mvc on IE8

I implemented a functionality to upload docs and form data using angularjs + spring mvc on my module. It is working fine. Now people are expecting the same app to run on IE8. IE8 is not supporting FormData. I removed it and created plain json object to transfer data. I am facing 500 error saying "the request was rejected because no multipart boundary was found"

Ajax call code

var attachmentType = {};
    attachmentType = $scope.uploadFile0;        

    var raiseServiceRequest = {};
    raiseServiceRequest.comments=$scope.comments,
    raiseServiceRequest.summary=$scope.summary,
    raiseServiceRequest.attachments=attachmentType;

    $http.post("./testTicket",raiseServiceRequest,{headers: {'Content-Type': 'multipart/form-data'}})
    .success(function(data){                         
         if(data.responseStatus==true){
             window.location.href = "./showTicketDetails?coltReference="+data.data[1]+"&isNew=true";
         }else{
             $scope.submitTicketStatus = false;
             $scope.blur = 1;
            console.log(data.responseMessage);
            $scope.displayProblem=true;
            $scope.problem="Error in raising incident ticket";
         }
    })
    .error(function(data){
        $scope.submitTicketStatus = false;
        $scope.blur = 1;
        console.log(data.responseMessage);
        $scope.displayProblem=true;
        $scope.problem="Error in raising incident ticket";
    });
}; 

Controller code

@RequestMapping(value = "/testTicket", method = RequestMethod.POST)
public @ResponseBody CommonResponse createIncidentTickets(RaiseServiceRequestDto raiseServiceRequest,HttpServletRequest request,HttpServletResponse response) {

    CommonResponse commonResponse = new CommonResponse();
    commonResponse.setResponseStatus(true);
  return commonResponse;
}

I need some good support on this guys. Thanks in advance.