Reason it isn't working for all of yous is because this is an old version, there is a new version as of 1st of July, I don't know if I should post link to the download as it on another forum, search for it or pm me.
Noob. You need to download the dll, And put it on your gunz folder.
It's patched? I mean it's really old..
whats the sourcedme website?