vb.org Archive - URL Rewrite from table

hello, it's my first post here, thanx to everyone reading this and sorry for my english.
Here is my situation:
I imported my old forum with impex ( joomlaboard) and everything went fine.
the problem is that i need to keep my old url for every single thread in the forum, and the url of the old forum didn't follow a specific regular expression.
i made a table in sql with the new id ( the one given by vbulletin) and the oldurl, so i have a "link" beetween the new url and the old one.
then i modified my htaccess this way:

Code:

RewriteEngine On

RewriteCond %{QUERY_STRING} t=([0-9]+)

RewriteRule showthread\.php\? redirect.php?action=thread&vbid=%1 [L]

With this i didn't solve the problem because when i click on a thread it opens the correct page ( www.example/oldurl.html) but it gives the 404 not found error. And when i pass my mouse on the thread ( without clicking on it) i see that the real link is still to the new url ( /showthread.php?=id).. so i understand that rewriterule doesn't really rewrite urls but just redirect them....
any help on solving this? i also need a solution compatible with vbseo ( for the future threads) or any other seo plugin (which is the best?)
thank you, best regards, ilanur.

X vBulletin 3.8.12 by vBS Debug Information
Template Usage: (1)ad_footer_end (1)ad_footer_start (1)ad_header_end (1)ad_header_logo (1)ad_navbar_below (1)bbcode_code_printable (1)footer (1)gobutton (1)header (1)headinclude (6)option (1)post_thanks_navbar_search (1)printthread (1)printthreadbit (1)spacer_close (1)spacer_open Phrase Groups Available: global postbit showthread	Included Files: ./printthread.php ./global.php ./includes/init.php ./includes/class_core.php ./includes/config.php ./includes/functions.php ./includes/class_hook.php ./includes/modsystem_functions.php ./includes/class_bbcode_alt.php ./includes/class_bbcode.php ./includes/functions_bigthree.php Hooks Called: init_startup init_startup_session_setup_start init_startup_session_setup_complete cache_permissions fetch_threadinfo_query fetch_threadinfo fetch_foruminfo style_fetch cache_templates global_start parse_templates global_setup_complete printthread_start bbcode_fetch_tags bbcode_create bbcode_parse_start bbcode_parse_complete_precache bbcode_parse_complete printthread_post printthread_complete
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Memory Usage 1,709KB
Queries Executed 10 (?)

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Hooks Called:

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X vBulletin 3.8.12 by vBS Debug Information
Page Generation 0.01169 seconds Memory Usage 1,709KB Queries Executed 10 (?)
More Information
Template Usage: (1)ad_footer_end (1)ad_footer_start (1)ad_header_end (1)ad_header_logo (1)ad_navbar_below (1)bbcode_code_printable (1)footer (1)gobutton (1)header (1)headinclude (6)option (1)post_thanks_navbar_search (1)printthread (1)printthreadbit (1)spacer_close (1)spacer_open Phrase Groups Available: global postbit showthread	Included Files: ./printthread.php ./global.php ./includes/init.php ./includes/class_core.php ./includes/config.php ./includes/functions.php ./includes/class_hook.php ./includes/modsystem_functions.php ./includes/class_bbcode_alt.php ./includes/class_bbcode.php ./includes/functions_bigthree.php Hooks Called: init_startup init_startup_session_setup_start init_startup_session_setup_complete cache_permissions fetch_threadinfo_query fetch_threadinfo fetch_foruminfo style_fetch cache_templates global_start parse_templates global_setup_complete printthread_start bbcode_fetch_tags bbcode_create bbcode_parse_start bbcode_parse_complete_precache bbcode_parse_complete printthread_post printthread_complete
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