Teniente ODST

Hi, im Teniente ODST, and i whant to try get help with other people. I download the map Forge Island, but at the moment to try play it they bring me a error [One or more players dont have the map] And im the only on the group. If some one can help me or try to help me please tell it. Thanks What i alredy tried: Remove the map and re-download the map. [Edit] Looks like Spartan Ops Happend that too Bring me a error when trying to play.