Halo 3 Experience Points?

[Steven]

I have good internet connection and I am ranked 18 in team slayer and 3 in lone wolves yet I dont have any experience points and i am still a recruit. Why is this happening, and how can i get experience points????

Thanks

 

[unknown]

kill much more people and complete all of the missions.

 

[OBEY]

Screw Halo get mario or zelda their boss !! Wii Rules!!