My stats will not update for Halo wars

I recently changed my gamertag. The waypoint achievment log says that I have not played the game yet. All of the other halo games I own have transfered thier achievements to my new tag. Is there any way to refresh this.

I tried: starting the game up, playing multiplayer matches, and earning achievments.

Please if there is a solution I would love to be educated.

01010010 01000101 01011000