Okay, I got tripped up on a PHP extension not being enabled and that caused me issues getting iDrive working on my Synology DS409. Once I found an obscure forum post indicating you need to enable mcrypt in PHP settings, I could get logged into the interface on my Synology.
Now I cannot select and folders or files for backup. I'm logging in with my admin account on the Synology, I even verified the shell was defined in my /etc/passwd file as indicated in the FAQ but still no luck. I have even tried with another account on my Synology, rebooting the Synology, reinstalling the iDrive package...doesn't do me much good if I cannot select any files to back up with. I opened ticket #ID00751477 this morning, hopefully they can offer some assistance.
I signed up this morning and will quickly be cancelling for a refund if I cannot get this working. I'm more than a bit alarmed about all the reports of poor support and the numerous issues people are reporting in the forums...