delisted by msn

having a bit of a stress, my site has been totally de-listed from msn, the msnbot is still visiting, but i've gone from having 300+ pages listed to 0, i have no idea what i've done to receive this penalty, if it is a penalty, i dont engage in dodgy seo techniques, in fact with other search engines my site is really taking off, i hadn’t had any major changes before the decline, i have since, the majority of my site is now CSS and validates, but this didnt stop the decline besides the untouched pages are also no longer listed

my site is http://www.grooming-health.com and would really appreciate any suggestions and insights you might have

thanks in advance
Seth

have you done any 301 redirect or changes to your site lately?

i have a htaccess file which does 301 redirect for pages that i've deleted but this is a recent addition and has been added since the delisting