Process.Start(url) sometimes one instance fails

Question

I need some help!!!
ASPX.NET/C#- Call Process.Start(url) several times, sometimes one instance fails without error!!
I have a program that calls a http aspx.net with arguments(URL) to execute some stuff. That program are invoking 10 times that aspx.net (all in the same time) with diferents urls.
But sometimes, one of the calls (url) do not launch in browser.
Code is very simple:
public partial class _Default : System.Web.UI.Page
private Object thisLock = new Object();
protected void Page_Load(object sender, EventArgs e)
try
string URL = Request.Params["URL"];
Logger.Log("CURRENT URL TO LAUNCH->", URL);
lock (thisLock)
ProcessStartInfo startInfo = new ProcessStartInfo("IExplore.exe");
startInfo.WindowStyle = ProcessWindowStyle.Maximized;
startInfo.Arguments = URL;
Process.Start(startInfo);
catch (Exception ex)
Logger.Log("Exception", ex);
}The URL launch are a client side technology!And that´s because i need to open the IE in WebServer!It´s silverlight web application to generate reports!The silverlight application closes the IE instances after finish. Everything goes right, except sometimes in 10 requests one fail 
Thanks

Answer 1

What's the url do?
Is it possibly that the url isn't ready or there?
I can't recall ever doing process start from a web page.
Maybe there's an alternative way of approaching whatever you're trying to do.
BTW
I think you should probably ask this question in the asp.net forum since there's actually no Silverlight in the mix there
Hope that helps.
Recent Technet articles: Property List Editing;
Dynamic XAML