playing haloce maps

[DS-Dust-P]

ok ive downloaded the triggerhappy map and i put it in the file but i cant get it to play what am i doing wrong??

[x13igDudex12]

what do you see when you you try to play it (error...balnk..none?)
cuz im thinkg a: its not the map
b: ur playing the wrong game or have it in the wrong folder
or c: the game isnt reading you map file (for some reason)