HaloMods "Classic" Read-only Archive

Hey, i JUST downloaded Halo CE and in the read-me file it says that to play new maps all you have to do is d/l the map and unzip it and what not and then drop it in the map directory. For some reason when i do this i get my most beloved window pop up (the "Gathering Exception" crap or whatever) and then Halo CE shuts down. THEN when I get back on Halo CE i cant play ANY levels without the same thing happening and i have to reinstall it. Does ANYONE know what's wrong with me/ my game?

well for me to help ur gonna have to be justa little more descriptive of what ur doing then what happens etc. just need a little more info and i should be able to help.