On Halo 3, I'm trying to play Ranked- Team Slayer and it gives me an error?

[Anthony E]

One or more players do not have the maps required to play ... error.

and I have the Heroic map pack and the Cold storage one.

I tried clearing the cache, reinstalling the maps, loading the maps in custom games and forge (they work in there). and reformatting the HDD.

 

[Greg]

I just went into halo and looked at the team slayer maps needed to play. It says Non-Mythic DLC Req. So you need all maps besides the Mythic Map Pack. Which means you need to download the Legendary Map Pack to play it now. (;