(Neltharion) Is there such thing as a working 4.3.4 (15595) 64 bit client?

As of late I've been experiencing audio-cracking exclusively in my 32-bit Wow client. I tinkered around as much as I can (Even running it in Windows 7 compatibility mode) but couldn't find a solution so I decided to download the 64-bit parts of the client from sources other than Warmane.

To my surprise it actually fixed my audio problems. Thing is, when I log in and I'm playing the game I can't cast anything nor can I log-off or quit the client (Without alt+f4). The animation plays but no casting bar appears and it doesn't cast the skill, it much resembles having lag. So it's basically unplayable.

I was just wandering if anyone is using a 64-bit client that works for version 4.3.4
And wouldn't mind advice on the cracking audio department if the 64-bit thing is not possible.