sephcot on "Robots.txt internal server error"

Hi all,

Any attempt to access the robots.txt file for one of the websites I run -- idolchatteryd.com -- comes back with a 500 Internal Server Error. That happens when I try to do so by typing idolchatteryd.com/robots.txt into the url, and (more disturbingly) it happens when I try to "fetch as Google" using Google Webmaster, which tells me the file is unreachable. For this reason, Google has -- *gasp* -- deindexed the site.

I really would like the site to be indexed, obviously, so what the heck do I do?

My Googling has told me that the .htaccess might be the problem, but I don't really know what to do with that information, or what I'd be looking for that could be problematic. So...help, please?

Thanks!