I got that problem just on US server:

 

So everytime the map changes on ZAM US (no matter if there is a !maprotate) i get kicked.

It says that the server connection is disconnected and that there was found a modificated client? :D  Invalid .IWD file.

 

But im able to just close that 'error' and join US server again, but my game is restarting as it normally does when it does load the mod. This takes too much time, so i never make it on time to the beginning.

 

How to fix it?

 

Notification:

 

 

 

Same thing to me.

Delete the mod files in: C: STEAM - SteamApps - Common - Black ops and mods.

 

Just delete the mod files, and try to download them again. If that doesn't help, then i'm not sure, i doubt its because of the language, as i have to use german and i never had that error before. Maybe reinstall your game?

i'll try later :)

xD Hunting the server dont want you anymore :P

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Last image says Remove, so that is what you need to do, once that is done join ZAM and let it download the files once again.

reinstalling the mod worked for me. kick-free yet  ;)