WordPress won’t update with ftp details in wp-config

I have a wordpress site http://briscdisc.co.za/, which I built pretty normally using WordPress. However, when I tried to update WordPress or my plugins, it asked my for my ftp details, which it wouldn’t accept at first.

I then went and put the details directly into wp-config. However, now when I try to update it just says:
Downloading update from downloads.wordpress.org/release/en_ZA/wordpress-4.7.2.zip… Unpacking the update…

Then it just stops. There’s not even a loading icon in the tab anymore, and the update doesn’t finish. I have also tried putting in define( ‘FS_METHOD’, ‘direct’ );, but it hasn’t helped.

I also tried:
# chmod 777 -R /path/to/wordpress

but got this error: The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.: wp-admin/includes/update-core.php Installation Failed

Any idea why this is happening?

My hosting is running SQL server 2008 and MySQL 5.x