ok beacuse i myself using vb2.3.0 i had the same problem and i went and fix the problem in the insert query. i recon it was a typing error.
PHP Code:
find this bit of code
$DB_site->query("INSERT INTO forum
(forumid,styleid,title,description,active,displayorder,parentid,
parentlist,allowposting,cancontainthreads,daysprune,newpostemail,newthreademail,
moderatenew,allowhtml,allowbbcode,allowimages,allowsmilies,allowicons,
styleoverride,allowratings,countposts,moderateattach)
VALUES
(NULL,'$styleset','".addslashes($title)."','".addslashes($description)."','$isactive','$displayorder','$parentid',
'','$allowposting','$cancontainthreads','$daysprune','".addslashes($newpostemail)."','".addslashes($newthreademail)."',
'$moderatenew','$aallowhtmlcode','$aallowbbcode','$aallowimgcode','$aallowsmilies','$aallowicons',
'$styleoverride','$allowratings','$countposts','$moderateattach'");
and replayce with this
$DB_site->query("INSERT INTO forum
(forumid,styleid,title,description,rulestext,active,displayorder,parentid,
parentlist,allowposting,cancontainthreads,daysprune,newpostemail,newthreademail,
moderatenew,allowhtml,allowbbcode,allowimages,allowsmilies,allowicons,
styleoverride,allowratings,countposts,moderateattach)
VALUES
(NULL,'$styleset','".addslashes($title)."','".addslashes($description)."','".addslashes($rulestext)."','$isactive','$displayorder','$parentid',
'','$allowposting','$cancontainthreads','$daysprune','".addslashes($newpostemail)."','".addslashes($newthreademail)."',
'$moderatenew','$aallowhtmlcode','$aallowbbcode','$aallowimgcode','$aallowsmilies','$aallowicons',
'$styleoverride','$allowratings','$countposts','$moderateattach')");