.net 权限问题

我的程序运行的时候，客户端报错：
可是我已经在.net配置向导里面把本地intronet,受信任站点配置成了完全信任，并且，客户端IE设置了受信任站点，但还是报告错误！
See the end of this message, instead of this dialog box, for details on invoking 
just-in-time (JIT) debugging.************** Exception Text **************
System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
   at System.Windows.Forms.SafeNativeMethods.IFont.GetHFont()
   at System.Windows.Forms.Control.ActiveXImpl.get_AmbientFont()
   at System.Windows.Forms.Control.get_Font()
   at System.Windows.Forms.Control.GetParentFont()
   at System.Windows.Forms.Control.get_Font()
   at System.Windows.Forms.ButtonInternal.ButtonBaseAdapter.CommonLayout()
   at System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintWorker(PaintEventArgs e, Boolean up, CheckState state)
   at System.Windows.Forms.ButtonInternal.ButtonStandardAdapter.PaintUp(PaintEventArgs e, CheckState state)
   at System.Windows.Forms.ButtonInternal.ButtonBaseAdapter.Paint(PaintEventArgs pevent)
   at System.Windows.Forms.ButtonBase.OnPaint(PaintEventArgs pevent)
   at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs)
   at System.Windows.Forms.Control.WmPaint(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ButtonBase.WndProc(Message& m)
   at System.Windows.Forms.Button.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
The action that failed was:
Demand
The type of the first permission that failed was:
System.Security.Permissions.SecurityPermission
The Zone of the assembly that failed was:
Trusted
************** Loaded Assemblies **************
mscorlib
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50215.312 (beta2PLUS.050215-3100)
    CodeBase: file:///C:/WINNT/Microsoft.NET/Framework/v2.0.50215/mscorlib.dll
----------------------------------------
System
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50215.312 (beta2PLUS.050215-3100)
    CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
testFormdll
    Assembly Version: 1.0.2124.30156
    Win32 Version: n/a
    CodeBase: http://www.shcrystal.shcrystal/testForm/testFormdll.dll
----------------------------------------
System.Windows.Forms
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50215.312 (beta2PLUS.050215-3100)
    CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System.Drawing
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50215.312 (beta2PLUS.050215-3100)
    CodeBase: file:///C:/WINNT/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
Microsoft.mshtml
    Assembly Version: 7.0.3300.0
    Win32 Version: 7.0.3300.0
    CodeBase: file:///C:/WINNT/assembly/GAC/Microsoft.mshtml/7.0.3300.0__b03f5f7f11d50a3a/Microsoft.mshtml.dll
----------------------------------------************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.For example:<configuration>
    <system.windows.forms jitDebugging="true" />
</configuration>When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.