Consecutive imports, second from vb 381 not working
 

I have a fresh installation of vb.
I have imported all from a fireboard forum. Went Ok.

After this successful import I want to import only users from another vb (381) forum.
I have manage to make the conection to vb import database (I have selected vb_36 from menue) and unfortunately is not working after checking.
It is checking and saving ID-s (it shows completed after each table) but after pushing complete button I get failure under first step and cannot proceed.

Or is there any way to import users from a vb installation to another? (both 383 at this moment)

Any ideas?