Tried to move to subdomain – now fails to open stream

My WordPress blog was at https://streaminggourmet.com, but then I decided to move it to https://blog.streaminggourmet.com. So I created the subdomain and the directory and moved the files over there. (Before moving the files, I updated the WordPress URL and the Blog URL in the Settings section of wp-admin).

Here’s the weird thing: I can log into wp-admin just fine and see all of my entries and everything, but when I click on visit site, I get this error:

Warning: require(./blog/wp-blog-header.php) [function.require]: failed to open stream: No such file or directory in /home1/streami5/public_html/blog/index.php on line 17

Fatal error: require() [function.require]: Failed opening required ‘./blog/wp-blog-header.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home1/streami5/public_html/blog/index.php on line 17

What’s weirder still is that the file it’s trying to go get (wp-blog-header.php) is right there in the /home1/streami5/public_html/blog directory.

I’ve scoured all of the documentation on moving a WordPress blog. It’s not a problem with defining the new URL – even in my MYSQL database, the home and siteurl are defined correctly as https://blog.streaminggourmet.com.

Is there something I’m missing here? Index.php and .htaccess should be in this “blog” directory with everything else, right? Like, not up in the Root directory?

Help!

Amy