I am using uploadify 2.1.4 to upload multiple files. It works well on Firefox 11.0 and IE9. However, it only works for the first time on IE8. For example, after starting IE and logging into my web application, I am able to choose multiple files and upload them successfully. However, If I click "Select Files" button to choose other multiple files to upload, the process will hang on the first file forever. I have to restart IE8 in order to upload files again.

I have tried several methods (including upgrading flash player) found in the forum without any luck. Could anybody help? Thanks.

Belows are my markup codes back-end script in asp.net project

----------------------Markup codes--------------------------





// $(document).ready(function () {
$('#file_upload').uploadify({
'uploader': '/uploadify/uploadify.swf',
'script': '/uploadify/upload.ashx',
'cancelImg': '/uploadify/cancel.png',
'fileDesc': 'CFG Files',
'fileExt': '*.cfg',
'folder': '/CFGFiles',
'auto': true,
'multi': true,
'buttonText': 'SELECT FILES',
'queueID': 'custom_Queue',
'onComplete': function (event, queueID, fileObj, response, data) {
document.getElementById('<%= hiddenText1.ClientID %>').value += fileObj.name + ";";
document.getElementById('<%= hiddenText2.ClientID %>').value += response + ";";
return true;
},
'onAllComplete': function (event,data){
document.getElementById('<%= btnParseFile.ClientID %>').click();
return true;
}
});
});
// ]]>




div id="divUpload" style="position:absolute; width:500px" runat="server"
input id="file_upload" type="file" name="file_upload" /
div style="height: 70px; margin-bottom: 10px; padding:10px; overflow: auto; width: 450px;" id="custom_Queue"/
/div


----------------------------Back-end script---------------------------------

public class Upload : IHttpHandler {

public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
context.Response.Expires = -1;
try
{
HttpPostedFile postedFile = context.Request.Files["Filedata"];

string savepath = "";
savepath = HttpContext.Current.Server.MapPath(@context.Request["folder"]);

/* rename file with random name to avoid naming conflits among different users */
Guid g = Guid.NewGuid();
string filename = Convert.ToBase64String(g.ToByteArray());
filename = filename.Replace("=", "");
filename = filename.Replace("+", "");
filename = filename.Replace("\\", "");
filename = filename.Replace("/", "");
filename += ".cfg";

//string filename = postedFile.FileName;

if (!Directory.Exists(savepath))
Directory.CreateDirectory(savepath);

postedFile.SaveAs(savepath + @"\" + filename);
context.Response.Write(filename);
context.Response.StatusCode = 200;
}
catch (Exception ex)
{
context.Response.Write("Error: " + ex.Message);
}
}

public bool IsReusable
{
get
{
return false;
}
}
}