Snapshots not creating snapshots on run

Hey all,

I just installed Snapshot, configured it for 2x monthly, and manually started the first backup. Nothing happened. Reset it to run manually. Nothing. Killed all non-WPMU plugins but Gravity Forms and Akismet. Nothing.

Because this is a strictly backend plugin, I realize there's not much anyone can do without a login; I have one ready to go. Just tell me where to send it.

Screenshot below, though, for kicks.

Site: http://www.gourmetbookdesign.com
Plugin: Snapshot
Screenie: http://www.gourmetbookdesign.com/wp-content/uploads/2013/05/snapshot.png