Broke Html order confirmation emails - only showing code

[gfdesigns]

Some how in my quest to change the background color of my html order confirmation emails I broke them. I only changed the color code and the header.jpg to logo.jpg and now the order confirmation emails are only spitting out code.
I have replaced the file email/email_template_checkout.html with the unedited Original and it is still not working.
I'm at a loss as to what I should do any help would be greatly appreciated.