Just to verify a point made earlier in this thread the Client Driven PST Migration only has a PST Migrator Task.
The server driven has the locator, collector and migrator tasks.
I had a couple of questions:
Do you have the policy set to mark .pst files? If so, has EV marked the .pst files? This can be checked by looking in the registry at HKCU\Software\KVS\Enterprise Vault\Client\PSTsMarked
Does the name of the person's computer show up under Personal Store Management -> Computers in the EV Console?
Where is the .pst file you are trying to import located?
Also to keep the EV log file generated by the EV Outlook client smaller, you can set the tracing to minimum and this will still allow you to see the PST Migration process steps.