It is very, very difficult to get in touch with MarkDC. Here are two places you can try...
3dutils.com/ because, it says he's switching support back there. Now it does say you can enter with the same log on as at CGAuction, but maybe you'll be able to get the verification email from here. And the other alternative is to see if you can comment his blog, here: www.3dutils.com/blog/
He is active, just on a slower than everyone else pace, I recently had a response from him the friday before last, but that was after a wait of about 5 days.

Editted to add -- if you can get through to post, be sure to leave an email for him to contact you.

kalonart.com