Im trying to filter a data set on 3 criteria

project name, start date, end date

the project name part is fine the problem im having is that im getting dates
outside of my date range

im using the following

start date <=21/02/2009 & end date =19/02/2009

im getting dates start after the start date, but not before

all three filter criteria are on the smae line, which to my understanding
means

project name & start date & end date

help please