Hello Everyone. I've recently upgraded to the AgoraCartPro version, which I highly recommend :D
I was having trouble uploading via FTP using the self installer because of some permission problems. So if the FTP doesn't work..try the AdminPro script. Agora staff recommended it on their install section and it worked perfectly for me! AdminPro can be found here: http://www.craigrichards.com/software/adminpro.html
He offers a free trial and it is easy to install.
Regards,
Vina