CuteWebUI.AjaxUploader, Version=3.0.0.0

When trying to upload file of a size of 1-2MB the uploading gets stopped then about 256KB is loaded and then alert is displayed:

 

Silverlight : The upload is interrupted!

WebException : UnknownError, [HttpWebRequest_WebException_RemoteServer]

Arguments:NotFound

Debugging resource strings are unavailable...

 

 

The strange thing: error does not occur if the site is published on localhost and 'http' is used ,

but occurs when published on another environment and 'https' is used. 

 

In addition, it occurres not on all computers, but on my - it is reproduced all the time.

 

 I'm using IE8  8.0.6001.18702

and Silverlight  3.0.40818.0

IE options are set to default.

 

Please, say your ideas why this may happen.

 

Thanks,

Dan