FileSystemWatcher Fires too Many Times

I have an instance of the FileSystemWatcher Running on XP as an NT service. The filter is set to "Last Write". I only want it to fire an event if a file is created or modified in a specific directory, but if I copy and past a file to that directory, it raises multiple events. That is, it may fire off up to 4 times for the same file. Any reason why this could be or what I'm doing wrong?

thanks

Open a dos window and navigate to the directory you are monitoring.

type this:

echo. > text.txt

Now check how many events are fired.

I am using pretty much the same code on Win 2K Server with .Net v1.1. Here is a link to my code:
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