Ok, so I seem to be having this problem, screenshots for the error messages:

 

It does this first, it just says Awaiting Challenge ...1.. then it starts to not respond then give me the error.

 

It gives me this error when I try connecting to WZ servers:

 

And this error on other servers; I tried multiple servers and still getting this error:

 

I've re-downloaded the installer and re-installed it and same problem, any suggestions and solutions to it?

 

 

Another error message; Yeh I name-changed to PhoeniX in the above photo ;P

You're not using a clean game client, and it's not even up to date.

You should have version 105, but you have some custom version 104.

Remove whatever custom dll that you added and then run iw4m updater again

You're not using a clean game client, and it's not even up to date.

You should have version 105, but you have some custom version 104.

Remove whatever custom dll that you added and then run iw4m updater again

So I've deleted the custom dll file then I re-installed IW4M and it tells me after that I don't have iw4m.dll, can someone upload it for me?

There's no need for anyone to upload it for your since you can get it from the updater.

Now what you have to do...

Open some folder (anything at all). Now on the address bar, type:

%localappdata%\iw4m\

and press enter.

It will open you IW4M's updater folder. Just delete caches.xml and start the game again.

Thanks, it worked, it's fixed...