Security exception unhandled when trying to create/write to EventLog

Hello experts!

i've written a windows service but i'm having some issues writing to the event log which is crashing my app.  i have a windows forms version of my app and this is the error I am getting:

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

Here is my code to write to the logs.



    Public Shared Sub LogInfo(ByVal sMessage As String)
        ' Write info into the event viewer

        If Not System.Diagnostics.EventLog.SourceExists("PopPatService") Then
            EventLog.CreateEventSource("PopPatService", "Application")
        End If
        EventLog.WriteEntry("PopPatService", sMessage, System.Diagnostics.EventLogEntryType.Information)
    End Sub

    Public Shared Sub LogEvent(ByVal sMessage As String)
        ' Write error into the event viewer

        If Not EventLog.SourceExists("PopPatService") Then
            EventLog.CreateEventSource("PopPatService", "Application")
        Else
            EventLog.WriteEntry("PopPatService", sMessage, System.Diagnostics.EventLogEntryType.Error)
        End If
    End Sub

I'd like the logging available so I can track what the service is doing since it is low on communication.  Any help would be appreciated!!!