Server Error in '/' Application.

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Line 14:         mail.BodyFormat = System.Web.Mail.MailFormat.Html;
Line 15:         mail.Body = "restarted";
Line 16:         System.Web.Mail.SmtpMail.Send(mail);
Line 17:     }
Line 18:     

[COMException (0x80040220): The "SendUsing" configuration value is invalid.
]

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
   System.RuntimeType.InvokeDispMethod(String name, BindingFlags invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers, Int32 culture, String[] namedParameters) +0
   System.RuntimeType.InvokeMember(String name, BindingFlags bindingFlags, Binder binder, Object target, Object[] providedArgs, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParams) +436
   System.Web.Mail.LateBoundAccessHelper.CallMethod(Object obj, String methodName, Object[] args) +72

[HttpException (0x80004005): The "SendUsing" configuration value is invalid.
]
   System.Web.Mail.LateBoundAccessHelper.CallMethod(Object obj, String methodName, Object[] args) +119
   System.Web.Mail.CdoSysHelper.Send(MailMessage message) +1955
   System.Web.Mail.SmtpMail.Send(MailMessage message) +131
   ASP.global_asax.Application_Start(Object sender, EventArgs e) in c:\web\kbcafe.com\Global.asax:16