ZedGraph ASP.NET with C# in Visual Studio 2010?

Sorry,It doesn't show a bitmap.I can't see the signal how can I fix it???

My plan is draw a signal in zedgraph in asp.net when I have a value.Creating a web application:
1)In Visual Studio,I select New Project>ASP.NET Web Application
2)It might also be helpful to run your tests in Medium trust as well. In the Web.Config file, inside the System.Web section, add: <trust level="Medium">.
3)In Solution Explorer, expand Properties and double-click to open AssemblyInfo.cs. Add:using System.Security;
[assembly: AllowPartiallyTrustedCallers ]
4)In Visual Studio,I hit Project--- Add Reference--- Browse (tab), and browse to ZedGraph.dll in your project /bin directory. Repeat to also add a reference to ZedGraph.Web.dll.
5)I add the ZedGraphWeb control to the Toolbox. Select the Toolbox tab (usually on the right) and scroll all the way to the last tab "General". Right-click and select "Choose item". Then hit "Browse" and browse to the ZedGraph.Web.dll that you just copied into your project \bin directory. This should result in a ZedGraphWeb control appearing in the Toolbox under the General tab at the bottom of the list.
6)Drag the ZedGraphWeb control onto Default.aspx (which is still in Designer view).But It isn't display a Zedgraph likely in Windows Forms.And I copy a code here http://www.codeproject.com/Articles/116696/ZedGraph-in-a-C-web-application-in-a-Medium-trust . into my project and run project it have a error(System.Security.SecurityException: That assembly does not allow partially trusted callers. at ZedGraph.Web.ZedGraphWeb.CreateGraph(Stream OutputStream, ImageFormat Format, Boolean bShowTransparency) at ZedGraph.Web.ZedGraphWeb.Render(HtmlTextWriter output) The action that failed was: LinkDemand The Zone of the assembly that failed was: MyComputer).
How can I fix it???
Thanks for your reply.