OOo 2.X Bug?

Hi, Using OOo 1.x Writer, when I inserted the field Insert-> Field-> Other-> DocInformation-> Modified-> Date, updated the field each time I saved the file. In OOo 2.X does nothing. The field doesn't change, remains empty. But, in this version, if I insert the field Insert-> Field-> Other-> DocInformation-> Created-> Date, the field changes each time I save the file. The interesting think is that the help says: Modified: Inserts the name of the author, and the date, or the time of the last save. Created Inserts the name of the author, and the date, or the time when the document was created. Did anyone had the same results? -- Regards, Lívio Cipriano