Hi MarjaR,
The silverlight plug-in will not update to version 5 automatically.
You can disable the silverlight upload mode by the code above, then it will not be the problem any more.
protected override void OnLoad(EventArgs e)
{
uploader1.SetAdvancedOption(UploaderAdvancedOption.NoSilverlight, "true");
base.OnLoad(e);
}
Regards,
Ken