为什么生成不了日志文件？

[DoItBetter]

在vGlobal.asax中，代码是这样写的：
Imports System.Diagnostics
Sub Application_Error(ByVal sender As Object, ByVal e As EventArgs)

Dim pageUrl, Message, logName As String
Dim event_log1 As New EventLog()

pageUrl = Request.Path

Message = "Page URL:" & pageUrl

logName = "MyLog"

If (Not EventLog.SourceExists(logName)) Then
EventLog.CreateEventSource(logName, logName)
End If

event_log1.Source = logName
event_log1.WriteEntry("Application error occured." + Message, EventLogEntryType.Error)

End Sub
为什么 “EventLog.CreateEventSource(logName, logName）”这一句没有产生记录文件？
谢谢指教！

[saucer]

did you check the Event Viewer under Control Panel->Administrative Tools?

you should be getting an error unless you are using impersonation or you have change the userName to "SYSTEM" in <processModel ..> in the machine.config located at

C:\WINNT\Microsoft.NET\Framework\v1.0.3705\CONFIG

[saucer]

用ASP.NET将网页错误信息写入系统日志
http://www.ccw.com.cn/htm/center/prog/02_6_7_5.asp

[DoItBetter]

我在page_load里面已经写了“Throw New FileNotFoundException("test exception")”
来产生一个错误，我一步一步调试的时候到“EventLog.CreateEventSource(logName, logName）”这一句的时候就跳出来了，不知怎么回事？