WatiN and RadAsyncUpload

Hello,

I am using WatiN to run some UI automated tests on my application.  I have been able to interact with most of telerik controls, except RadAsyncUpload.

Currently I am unable to upload a file using WatiN.  I understand that telerik uses another testing platform, but I am looking to see if maybe someone in your team can help me figure out how to use WatiN to uplad a file via the RadAsynUpload control.

<telerik:RadAsyncUpload ID="upAttachment" runat="server" AllowedFileExtensions=".pdf,.jpg,.jpeg,.gif,.png,.bmp" TabIndex="9">    

<Localization Select="Select File" />

</telerik:RadAsyncUpload>