Hi, in that case there's something else missing in your project. Please, send the whole sample project to our support e-mail (support {at} nevron [dot] com). We will check it out and tell you what's wrong.
Best Regards,Nevron Support Team
Hi Marcelo,
Please, make sure that in the code behind you activate the ajax mouse click callback tool just as in the example you are talking about:
protected void NDrawingView1_QueryAjaxTools(object sender, EventArgs e)
{
// Configure the client side tools
NDrawingView1.AjaxTools.Add(new NAjaxMouseClickCallbackTool(true));
}