Try using either:
1. @Command([FileSave]); @Command([FileCloseWindow]) in the save button/action.
2. or use the SaveOptions field. Setting this to "1" will always save the document and setting to to "0" will never save the document. One hint though, in the PostOpen event you may want to delete the field to prevent saving when you do not want to. If you always want to save leave this field set to "1". Check the Domino Designer help for more info on this field. Search for SaveOptions.
Good Luck,
Craig