I know I'm reviving an old post, but I'm facing the same problem, and I can't find ANYTHING that helps. I've been searching for a couple days at least - no luck. Does anyone have any insight or knowledge on this?
Looks like this is only possible when using FastCGI.
http://markmail.org/message/3g7yvrq2oum6a5h4#query:+page:1+mid:yhiw6xqawegwokfg+state:results