Unable to get past Impex module 001
 

I'm unable to get past module 001* trying to import from phpBB2:

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Altering tables

ImpEx will now Alter the tables in the vB database to include import id numbers. This is needed during the import process for maintaining references between the tables during an import. If you have large tables (i.e. lots of posts) this can take some time. They will also be left after the import if you need to link back to the original vB userid.
moderator - importmoderatorid Completed
usergroup - importusergroupid Completed
ranks - importrankid Completed
poll - importpollid Completed
forum - importforumid Completed
forum - importcategoryid Completed
user - importuserid Completed
style - importstyleid Completed
thread - importthreadid Completed
post - importthreadid Completed
thread - importforumid Completed
smilie - importsmilieid Completed
pmtext - importpmid Completed
avatar - importavatarid Completed
customavatar - importcustomavatarid Completed
customprofilepic - importcustomprofilepicid Completed
post - importpostid Completed
attachment - importattachmentid Completed
pm - importpmid Completed
usernote - importusernoteid Completed
phrase - importphraseid Completed
subscription - importsubscriptionid Completed
subscriptionlog - importsubscriptionlogid Completed Failed Check database permissions and connection* or table prefix to ensure its correct

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I triple-checked my configuration file* all of the values are correct for both old & new databases* so that's not the problem. I run my own server* even tried putting the root mysql password in the ImpEx config file* so it's not a permissions issue.

The vBulletin database is a clean install* no data has been added yet. The subscriptionlog table exists but contains no rows.