date parameter in query not working quite right

Hi I have a Query [qry_master] which contains a field [notedate] I want
the user to be able to specify an as of date and I want that as of date
to include the date that they specify. Currently in my fields criteria
line I have

<=[Enter an As Of Date]

But when the query runs it never included the entered dates
information. Does anyone have any ideas why this might be?

Thanks!
Brian

.