Here are some sites to enter your pictures, keep trying. There are a lot of 'real' contests out there. BUT the most important thing to remember when entering a contest is ''you loose all rights to ''your'' photo''. So make sure this is what you want to do first. May be a better idea to try and sell them to a newspaper or magizine.
Do a Google search and it will bring millions of contests.
Katz

http://public.fotki.com/jtl10/

http://www.pbase.com/