Erm – that’s not quite right. You need to switch to the default theme automatically by renaming your current theme’s folder inside wp-content/themes and adding “-old” to the end of the folder name using FTP or whatever file management application your host provides.
Oh ok I wasn’t aware of the “-old” thing. However, I just tried that and I’m still having the same issue.
It still re-directs me to the home page.