need help with phpbb3 integration

hello, I have a problem, the plugin doesn't work.

All seems correct:

x plugin actived,

x forum uses the same database like elgg

x memberlist.php replaced

x phpbb_ prefix

x the same domain for both.

BUT when a new account the plugin doesn't create a phpbb3 account. what could be my errror? Maybe somebody is using too this plugin and can help me

I would also pay something for help!

THX