Nlog Error when setting property 'Layout' on File Target[file] - nlog

Question

I have a problem when i use nlog for error and logging. Here is my code :
Error : Error when setting property 'Layout' on File Target[file]
Nlog.config
<target name="file" xsi:type="File" layout="${date}|${level}|${logger}|${steps_guid}|${machinename}|${windows-identity:domain=false}--${message} ${exception:format=message,stacktrace:separator=*" fileName="E:\myapplication.log" />
<target xsi:type="Database" name="database" connectionString="Data Source=xxx;Initial Catalog=xxx;Integrated Security=True" commandText="exec [dbo].[LOGINNG_CREATE] #steps_guid,#log_application ,#log_date,#log_level ,#log_logger , #log_message ,#log_machine_name , #log_user_name ,#log_call_site ,#log_thread ,#log_exception , #log_stacktrace ">
<parameter name="#steps_guid" layout="${steps_guid}"/>
<parameter name="#log_application" layout="${application}"/>
<parameter name="#log_date" layout="${date}"/>
<parameter name="#log_level" layout="${level}"/>
<parameter name="#log_logger" layout="${logger}"/>
<parameter name="#log_message" layout="${message}"/>
<parameter name="#log_machine_name" layout="${machinename}"/>
<parameter name="#log_user_name" layout="${windows-identity:domain=true}"/>
<parameter name="#log_call_site" layout="${callsite:filename=true}"/>
<parameter name="#log_thread" layout="${threadid}"/>
<parameter name="#log_exception" layout="${exception}"/>
<parameter name="#log_stacktrace" layout="${stacktrace}"/>
</target>
and c# code and i dont know is it necessary:
Logger loggerClass = LogManager.GetCurrentClassLogger();
GlobalDiagnosticsContext.Set("steps_guid", steps_guid);
return loggerClass;
and i use it like this :
public bool Login(Entity.USERS user)
{
try
{
this.PageRepository = new xxx.Business.UserBusiness();
logger.Info("User service's instance created");
return this.PageRepository.Login(user);
}
catch (Exception ex)
{
logger.ErrorException("User services login Error", ex);
return false;
}
}