Missions

Todays mission is Columbia and this mission need 35 kills.I started play at this moorning and i have now 69/35 kills but no function.In one match i had 30 kills and in this match was 10-16 players and all is ok but my mission is on >0<

EDIT: i was restart comp., change IP address and play and nothing again

Where is problem? My comp. is already clean, i installed Windows XP yesterday and all is OK with my comp. and connection