Proving Ground Playlist Not Found

Help!!! I downloaded a map pack and lost the Proving Ground playlist…its no longer showing…was this a temp playlist or is it still going and im just not seeing it? What can i do to get back the Proving Ground Playlist in Matchmaking???

The Proving Ground playlist was recently removed from Matchmaking. The gametypes from the playlist were added into Team Slayer and Team Objective.

Thank You for clearing this up for me,i thought i was going crazy or something…too bad because that was like the only competitive playlist avail. as far as MLG style…guess i wont be playing halo for awhile again