phpBB2 : error during converting

[gloups]

Hi.

I try to convert a phpbb 2.0.19  forum to SMF.

During converting, it stops with errors :

Converting posts (this may take some time)...The database value you're trying to insert does not exist: poster_name
Warning: mysql_fetch_assoc(): supplied argument is not a valid MySQL result resource in convert.php on line 730

Can you help me?

Thanks !

[gloups]

(to convert, I use : smf_2-0_phpbb2_converter.zip )