i messed with apache reversing few months ago, and to be honest i think your configuration on the HFS-side could (and should) have been done on the Apache side.
Can't truly find the solution you need, sorry, got very little time, but i would personally prefer having the whole configuration on a single side, because it's easier to have just one point to look at when something is wrong. It's a good-design principle, to say it all.
So, in my opinion that can be seen fully as an apache configuration problem, and you should ask for help to apache experts.