Not prepared to hold hands, (not an expert) but I don't think that you need to use the sleepenabler.kext with your board. My setup is similar, and using d00d's dsdt, you should be able to have native power management, with functioning sleep. I've found that sleepenabler can cause issues. Try removing it, rebuild the cache, and try manually putting your system to sleep, if it goes to sleep, then you're good to go, you may just need to install a script for timed sleep to work. Also, there are all kinds of dsdt options on the first page of this post, concerning functioning audio. For our board, there's even an option of dsdt only modification without kexts for audio. d00d has done a lot of work on this subject, it's all on the first post.
d00d- Thanks again!
Thanks but it's all sorted now. Try reading the thread.