Custom AsyncUploadConfiguration Properties not deserializing

[Michael]

We have been using version 2010.3.1109.35 since 2010-11-11 without problems, upgraded to version 2010.3.1215.35 on 2010-12-25. The RadAsyncUpload is now failing to deserialize our custom AsyncUploadConfiguration properties.
Sample code below.
ASPX page with the RadAsyncUpload control:

<telerik:RadAsyncUpload runat="server" ID="FilesToUpload" MultipleFileSelection="Automatic"
    HttpHandlerUrl="~/Tracking/FileUpload.ashx" AutoAddFileInputs="true" />

Custom Configuration:

public class CustomConfiguration : AsyncUploadConfiguration
{
    public string UserName { get; set; }
    public long FileNoteID { get; set; }
    public bool SaveContentOnly { get; set; }
}

Initializing configuration in code behind of ASPX page with RadAsyncUpload control

public partial class UploadFiles
{
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
CustomConfiguration config = FilesToUpload.CreateDefaultUploadConfiguration<CustomConfiguration>();
            config.FileNoteID = 1234; // sample ID
            config.UserName = "michael"; // sample user name
            config.SaveContentOnly = true;
            FilesToUpload.UploadConfiguration = config;
    }
}

Code behind of Http handler, our additional properties (UserName, FileNoteID) are not being deserialized here anymore.

public class FileUpload : AsyncUploadHandler
{
    protected override IAsyncUploadResult Process(UploadedFile file, HttpContext context, IAsyncUploadConfiguration configuration, string tempFileName)
    {
        CustomConfiguration config = configuration as CustomConfiguration;
        if (config != null)
        {
            // UserName & FileNoteID come through as "" and 0 with latest release.
            DoSomething(config.UserName, Config.FileNoteID);
        }
    }
}

Can someone please let me know how to resolve this issue? Do we need to change something in our web.config?

Thanks

[Genady Sergeev]

Hi Michael,

This is a known issue with RadAsyncUpload, which we have addressed with latest internal build. Could you please upgrade? Information on how to obtain a latest internal build can be found here.

All the best,
Genady Sergeev
the Telerik team