After fighting with it for quite a while, we renamed the wordpress index.php to index.php.wp and replaced it with the original index.php file.
Now we're stumped. ... In order to get back into the wp-admin, I need to go to the MySQL database and change the "siteurl" back to "http://www.ascendtraining.com/blog/"
At that point, the blog site is working again, but the original site is not (due to the new index.php file). I put the old index.php file in just to reduce total down time.
Please let me know if you can help!