SMF 1.1.11 to vBulletin 4
 

I've encountered an issue while trying to import user accounts and posts from an existing SMF 1.1.11 site to the latest vBulletin 4. I downloaded the latest Impex from the same place I downloaded the latest vBulletin however I get an error saying that some of the tables (such as users, etc) don't exist for SMF.

I have to assume that the version of SMF from 1.1.11 to SMF 2 has altered the database structure significantly. I'm wondering if an older version of imprex would be able to convert the older SMF over to a compatible VBulletin? Would I be able to do this or has VBulletin versions 2 or 3 changed probably just as much as SMF versions have?

Thanks for any light you may shed on the matter.