EventLog - errors during write

Question

I use Event log like that:

if(!EventLog.SourceExists("Service"))
                EventLog.CreateEventSource("Service","Sending notification email error");
                EventLog.WriteEntry("Service",
                                    System.String.Format("Sending notification email error {0} \n {1} \n From {2} \n To {3} ",
                                    Error.Message,Error.StackTrace,From!=null?From.Address:"",
                                    To!=null?string.Join(",",To.ToList()):""),
                                    EventLogEntryType.Warning,2);

I have that code in two projects of same solution. But when I try to log information on production - one code log successfully, when other give me error

The source was not found, but some or all event logs could not be searched. Inaccessible logs: Security

I can not find what make a difference that other is not working :/

I do like on this blog but i refer to .net 4.0 folder cause my app use .net4.

Any idea?

Answer 1

You must be administrator to create an event log source. Do you have the correct rights?