Cod5 impure client iwd.file referenced
 

Hi
When ever i download this mod when i am entering this server called U3 ZombieX which i had played the night before but when i tried the next day this problem occurred it gets to about 7.47mb out of 8.90 then it says error "Impure client detected. Invalid . IWD files referenced!
C:/documents and settings/Dk/Local settings/Application Data/activision/CoDWaW/mods/zombieX/ZombieX.iwd

then cod5 just closes
what can i do to fix this?