C# ;Error when displaying flow graph

[mylog]

I have downloaded a GLEE(Graph Layout Execution Engine) and written the following code to display a windows form from a web page but i am encountering with a small problem on displaying the graph into the display and I am getting the following error when I run the web page.Can anybody solve this problem. I would be very grateful. Thanks

Error:
System.InvalidO perationExcepti on: Showing a modal dialog box or form when the application is not running in UserInteractive mode is not a valid operation. Specify the ServiceNotifica tion or DefaultDesktopO nly style to display a notification from a service application.

Code:
using System;
using System.Data;
using System.Configur ation;
using System.Collecti ons;
using System.Web;
using System.Web.Secu rity;
using System.Web.UI;
using System.Web.UI.W ebControls;
using System.Web.UI.W ebControls.WebP arts;
using System.Web.UI.H tmlControls;
using System.Windows. Forms;
using System.Componen tModel;
using System.Drawing;
using System.Text;
using Microsoft.Glee;
using Microsoft.Glee. Splines;

public partial class Flow : System.Web.UI.P age
{
protected void Page_Load(objec t sender, EventArgs e)
{
//create a form
System.Windows. Forms.Form form = new System.Windows. Forms.Form();

//create a viewer object
Microsoft.Glee. GraphViewerGdi. GViewer viewer = new Microsoft.Glee. GraphViewerGdi. GViewer();

//create a graph object
Microsoft.Glee. Drawing.Graph graph = new Microsoft.Glee. Drawing.Graph(" graph");
//create the graph content
graph.AddEdge(" A", "B");
graph.AddEdge(" B", "C");
graph.AddEdge(" A", "C").EdgeAttr.C olor = Microsoft.Glee. Drawing.Color.G reen;
graph.FindNode( "A").Attr.Fillc olor = Microsoft.Glee. Drawing.Color.M agenta;
graph.FindNode( "B").Attr.Fillc olor = Microsoft.Glee. Drawing.Color.M istyRose;
Microsoft.Glee. Drawing.Node c = graph.FindNode( "C");
c.Attr.Fillcolo r = Microsoft.Glee. Drawing.Color.P aleGreen;
c.Attr.Shape = Microsoft.Glee. Drawing.Shape.D iamond;

//bind the graph to the viewer
viewer.Graph = graph;

//associate the viewer with the form
form.SuspendLay out();

viewer.Dock = System.Windows. Forms.DockStyle .Fill;
form.Controls.A dd(viewer);
form.ResumeLayo ut();

//show the form
form.ShowDialog ();

}
}