Same problem and error message with the optimizer with Toolbox 2.0.1.
"Intel SSD optimizer could not run due to the presence of Volume shadow copy ....."
Intel X25-V - 40Go - SSDSA2MP040G2K5
Windows XP SP3
VSS service started (automatic).
The optimizer works with Toolbox 1.3, but the schedule is not working, same message.
As an FYI, I've moved the 120G ssd to a new windows 7 laptop where the SSD optimizer works fine, but I won't be able to determine what in XP was the issue.