My adblock plus is working fine. But I did have a problem with it a few weeks ago. Uninstalled Chrome, reinstalled it and installed adblock plus and it was ok.
Edit: I just notice the OP started this several years ago. Yeah, the adblocker isn't completely blocking ads. I still get some on certain sites. But not as bad if I didn't have it. And some sites slow down to a crawl without it.