InfoPath & WCF Service Jithendrian. R 10.08.2006 12:56:01 hi i have designed a InfoPath 2007 Form to add client details to my database.. this InfoPath form talks with a WindowsCommunicationFoundationService(WCFService)..and i have written the logic in a button_click event... i am able to run the form..but after entering the details in the form and when the button click takes place its not going into the button click event....instead i am getting an exception message as follows " System.Security.SecurityException That assembly does not allow partially trusted callers. at System.Security.CodeAccessSecurityEngine.ThrowSecurityException(Assembly asm, PermissionSet granted, PermissionSet refused, RuntimeMethodHandle rmh, SecurityAction action, Object demand, IPermission permThatFailed) at ClientAddNavigator.FormCode.CTRL9_5_Clicked(Object sender, ClickedEventArgs e) at Microsoft.Office.InfoPath.Internal.ButtonEventHost.OnButtonClick(DocActionEvent pEvent) at Microsoft.Office.Interop.InfoPath.SemiTrust._ButtonEventSink_SinkHelper.OnClick(DocActionEvent pEvent) " i don know what or where exactly the problem is.....need help regarding this... Thanks Jithendrian. R