Yes,
Note 2 things about the error message...
1) it indicates the the table does not exist...
2) the SQL shows the table as "users"... this typically should be "phpbb_users"
So what this is telling me is that it can not find the phpbb users table.
Assuming that phpbb and Joomla/CB are installed in the same database, then the "forum directory" is not set correctly. For v1.0.2 or 1.0.3 the forum directory is based on the server variable $_SERVER which most servers have... If your server does not have that variable then for v1.0.2 or v1.0.3 we will need to hard code some path variables... (typ. might be an issue on IIS servers)
The DOC_ROOT variable above reflects the websites main directory... i.e. the directory where
www.yoursite.com goes to. the default "forum directory" is "forum" which would mean that phpbb is at
www.yoursite.com/forum...
This can be modified to reflect the forums location and directory name. Note that the forum directory entry does not have a preceeding or trailing slash though... this has caused errors in some cases...
Hope this helps,
Greg