Modded version - register error

I am testing a version I found here : http://nukedwebtree.com/

It integrates mx, phpbb, and osc to make a shop with a forum...
We have run into a registration 'looping' issue, and could use some direction.
My test site: http://www.w-n-jbirds.com/mxnuke/oscbb2/
The script is still in Alpha testing, and will be released as Beta when we can get this bug out.
I will be writing a 'how to' install guide for powweb folks, and offer my time for install problems shortly.

Simple install for powweb:
unzip
delete or rename "top level" .htaccess

Edit files
/html/config.php (ignoring the statement ' Do not modify this file' )
/html/oscbb2/bb_config.php
Enter your sql server, database name/username/and password
(mysqlxx.powweb.com)

CHMOD files 0666:
html/config.php
html/config.php.contrib
html/oscbb2/includes/configure.php
html/oscbb2/admin/includes/configure.php

direct browser to www.yourdomain DOT TLD/install_directory/oscbb2/install/
Installation will appear the same as OSC default until you complete step=5, where you will see a new button 'install mx'
Complete the mx installation and CHMOD files above to 644.
Rename/delete the install DIR as in OSC.
go to www.yourdomain DOT TLD/install_directory/oscbb2/admin
log in as 'admin' pass '123456'
from here you can follow the install docs included in the download.



*NOTE*
This is NOT ready for NOVICES, BEGINNERS, or NEWBIES just yet.
Feel free to visit the download site to follow developments of the testing.

Feedback of the overall appearance can be made here.
Thanks,
Wayne