我用uploadify控件上传文件，出现httpError404错误

jsp代码如下：

<p><input type="file" name="uploadify" id="uploadify" /></p>
<p><a href="javascript:$('#uploadify').uploadify('upload','*')">Upload Files</a></p>

$(function() {
    $("#uploadify").uploadify({
    debug : true,
        height        : 30,
        swf           : '${pageContext.request.contextPath }/uploadify/uploadify.swf',
        cancelImage : '${pageContext.request.contextPath }/uploadify/uploadify-cancel.png',
        uploader      : '<%=path%>/info/SysClientAction_upload.do',
        width         : 120,
        auto: false,
        buttonText : '选择文件',
        method:'get',
        fileObjName:'uploadify',//和input的name值一样，struts2就能接收处理
        fileSizeLimit : '200KB',
        uploadLimit:5,
        multi: true,//设置同时上传多个文件
        'onUploadError' : function(file, errorCode, errorMsg, errorString) {
            alert('The file ' + file.name + ' could not be uploaded: ' + errorString +","+errorCode+","+errorMsg);
        }
    });

});

我在struts中将文件存到服务器制定的文件中，结果是文件已经上传到服务器中了，可是还是报404错误。用debug调试，如下显示：

---SWFUpload Instance Info---
Version: 2.2.0 2009-03-25
Movie Name: SWFUpload_0
Settings:
upload_url:               /ytgg_infoSys/info/SysClientAction_upload.do
flash_url:                /ytgg_infoSys/uploadify/uploadify.swf?preventswfcaching=1375105680980
use_query_string:         true
requeue_on_error:         false
http_success:             
assume_success_timeout:   30
file_post_name:           uploadify
post_params:              [object Object]
file_types:               *.*
file_types_description:   All Files
file_size_limit:          200KB
file_upload_limit:        5
file_queue_limit:         999
debug:                    true
prevent_swf_caching:      true
button_placeholder_id:    uploadify
button_placeholder:       Not Set
button_image_url:         /ytgg_infoSys/info/
button_width:             120
button_height:            30
button_text:              
button_text_style:        color: #000000; font-size: 16pt;
button_text_top_padding:  0
button_text_left_padding: 0
button_action:            -110
button_disabled:          false
custom_settings:          [object Object]
Event Handlers:
swfupload_loaded_handler assigned:  false
file_dialog_start_handler assigned: true
file_queued_handler assigned:       true
file_queue_error_handler assigned:  true
upload_start_handler assigned:      true
upload_progress_handler assigned:   true
upload_error_handler assigned:      true
upload_success_handler assigned:    true
upload_complete_handler assigned:   true
debug_handler assigned:             true


SWF DEBUG: SWFUpload Init Complete
SWF DEBUG: 
SWF DEBUG: ----- SWF DEBUG OUTPUT ----
SWF DEBUG: Build Number:           SWFUPLOAD 2.2.0
SWF DEBUG: movieName:              SWFUpload_0
SWF DEBUG: Upload URL:             /ytgg_infoSys/info/SysClientAction_upload.do
SWF DEBUG: File Types String:      *.*
SWF DEBUG: Parsed File Types:      
SWF DEBUG: HTTP Success:           0
SWF DEBUG: File Types Description: All Files (*.*)
SWF DEBUG: File Size Limit:        204800 bytes
SWF DEBUG: File Upload Limit:      5
SWF DEBUG: File Queue Limit:       5
SWF DEBUG: Post Params:
SWF DEBUG: ----- END SWF DEBUG OUTPUT ----
SWF DEBUG: 
SWF DEBUG: Event: fileDialogStart : Browsing files. Multi Select. Allowed file types: *.*
SWF DEBUG: Select Handler: Received the files selected from the dialog. Processing the file list...
SWF DEBUG: Event: fileQueued : File ID: SWFUpload_0_0
SWF DEBUG: Event: fileDialogComplete : Finished processing selected files. Files selected: 1. Files Queued: 1
SWF DEBUG: StartUpload: First file in queue
SWF DEBUG: Event: uploadStart : File ID: SWFUpload_0_0
SWF DEBUG: ReturnUploadStart(): File accepted by startUpload event and readied for upload.  Starting upload to /ytgg_infoSys/info/SysClientAction_upload.do? for File ID: SWFUpload_0_0
SWF DEBUG: Event: uploadProgress (OPEN): File ID: SWFUpload_0_0
SWF DEBUG: Event: uploadProgress: File ID: SWFUpload_0_0. Bytes: 13192. Total: 13192
SWF DEBUG: Event: uploadError: HTTP ERROR : File ID: SWFUpload_0_0. HTTP Status: 404.
SWF DEBUG: Event: uploadComplete : Upload cycle complete.
SWF DEBUG: Event: AssumeSuccess: 30 passed without server response

换ie浏览器又报302错误，是sessionID的错误吗?怎么解决？