I tried up upgrade our moodle server today from 1.5.3 to 1.7.1
I made a backup copy of C:\Moodle and D:\Moodledata should anything go worng.
I downloaded 1.7.1 and replaced the c:\moodle with the new folder. I started moodle and all looked good - got right the way to the end and to the admin login screen.
I copied over my config.php file from my backup moodle folder, but this did not appear to make any difference when I restarted moodle - only the new admin account would work and I had no courses etc.
OK at this stage I give up with the upgrade - delete the 1.7.1 moodle folder and replace it with the original moodle folder - however I'm now left with a problem saying that there is a connection problem to the database or the config.php file.
Can anyone help?
Thanks in advance