I consider it
rude that you are asking the same question all over different forums, just to check who gives the
cooked code first.
http://sharepoint.stackexchange.com/questions/120743/get-a-list-of-events-that-are-between-two-date[
^]
Apart from that CAML isn't rocket science. Have you tried to debug?
What are the results you get if you remove the filter from CAML? Is the format of startdate and enddate you are passing is correct?
There are so many variables but the best person who can really help is you yourself.