how can i play Team Slayer on Halo 3 online..?

[lawl4rofl]

everytime i select Team Slayer when im on matchmaking it gives me this message:
"One or more players do not have the maps required to play in this playlist."
how do u get these maps..?? thanks..

 

[Erickio]

You have to go to Marketplace and download the extra map packs using Microsoft points. Unfortunately, they cost extra money. You can still play Social Slayer without the extra maps.