Event log property doesn't retain setting changes..

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From: KC (chhatra_at_hotmail.com)
Date: 02/06/04 

Date: Fri, 6 Feb 2004 09:49:28 -0800

Hi,
I created a new event log source and log and user WriteEntry to enter the
log as follows:

' Create the source, if it does not already exist.
        If Not EventLog.SourceExists("MySource") Then
            EventLog.CreateEventSource("MySource", "MyNewLog")
       End If

        ' Create an EventLog instance and assign its source.
        Dim myLog As New EventLog()
        myLog.Source = "MySource"

        ' Write an informational entry to the event log.
        myLog.WriteEntry("Writing to event log.")

When I "Right Click" the log and change the property and close, it doesn't
retain the change. For example; If I change the Log size property from
"Overwrite in 7 days" to "Overwrite events when needed", it changes back to
"Overwrite in 7 days." etc..
Am I doing something wrong in the code..

Thanks in advance,
KC