This is what I get when joining the channel:
[Link] #worldwideirc has become full, so you are automatically being transferred to the linked channel #end-of-the-irc
The channel seems full. I can't explain the disconnection though, but it could be related to your script. Perhaps you have a /who on join that is flooding you off.
In mIRC type:
//echo -a $md5($mircexe,2) $version $os $file($mircexe).sig $script(0) $dll(0)
And report the results here.