Data type invalid when use getAllDocumentsByKey searching view

I have a column named Month in view, the data type is Date(i use @Date(2006,11,20) for translation); and a column named Name, the data come from a Text field. then in one lotus script, i use getAllDocumentsByKey to find the special documents, but the argument of the method have some trouble, i don’t know which data type in louts script can match the Month column? i use NotesDateTime, but it pop-up a messagebox showing “invalid data type” when i debug the script. and i also don’t know which data type of keyAarry for the argument? I use “Dim keyArray(2) as Variant”, but i seems trouble. any ideas? thanks!