Importing db v5.0.85-community-nt to db v5.6.24-log

[NumNum]

I have been trying to import my old db on a windows 2000 server to a windows 2012r2 and am getting the following error using impexe.

PHP Code:

ImpEx Database error

mysql error: Invalid SQL: 
            ALTER TABLE `user`
            ADD INDEX `importuser_index` ( `importuserid` )
            

mysql error: Key column 'importuserid' doesn't exist in table

mysql error number: 1072

Date: Friday 24th 2015f April 2015 05:34:05 PM
Database: vbulletin
MySQL error: 


Looking for any help on this.