My DateTime.ParseExact does not work but it should

This statement

DateTime myDate = DateTime.ParseExact(
    "Wed May 25 14:14:13.000 2016", 
    "ddd MMM dd HH:mm:ss.fff yyyy", 
    System.Globalization.CultureInfo.InvariantCulture);

give error saying String was not recognized as a valid DateTime.

I can't understand this. I have the same format as the first string I pass to DateTime.ParseExact

//Tony