Import failed : problem with table prefix?
 

I'm trying to transfer phpbb3 to VB. Its saying to me:

If you have all red tables* i.e. none correct this could possible be your table prefix :

phpbb_
Failed Check database permissions and connection* or table prefix to ensure its correct

Does anybody know what this means? I didn't think I had a prefix. I checked my config file and couldn't find one:confused: