Upgrading Drupal

hello,
I just made a redirectionpermanent on htaccess
redirectionpermanent /cours-astuce http://www.site.com/astuce-cour.html

when I open the page I http://www.site.com/cours-astuce deriga to the same page but with the link http://www.site.com/astuce-cour.html?q=cours-trick

a problèm is in ?q=cours-astuce
plyse help me

going from 6.6 to 6.13 and changing servers
disabled non-core modules before dumping the database
relevant files locaated in sites/all/modules and sites/all themes
installed and upgraded
in admin/build/modules only core modules listed
double-checked directory permissions (755)

On an earlier attempt I could install new modules but not get the original non-core ones to show.
Now I can't get any to display other than core.

Thx. Paul

moving my app from 6.6 on old server.
before downloading the db contents (with mysqldump) I set the site offline as suggested
downloaded 6.13 to new server
uploaded database contents
started drupal update and entered the db credentials (these are different on new server)
after the update completed I tried to go to admin
however, all I get is the site offline message. No admin menu and no login prompt.

what has gone wrong?

Thx Paul

Got following warning.

call_user_func_array() [function.call-user-func-array]: First argument is expected to be a valid callback, 'views_access' was given in /customers/ga-le.de/ga-le.de/httpd.www/includes/menu.inc on line 452.

What should I do?

Luca

The following line appears in the bottom of the .htaccess file of the 6.13 drupal core release.

# $Id: .htaccess,v 1.90.2.3 2008/12/10 20:04:08 goba Exp $

Does this identify the version of .htaccess ?

If so the 6.12 drupal used the same version, therefore the current version of .htaccess does not need to be copied during the upgrade, right?

I'm getting this error message when I try to load cron.php: There has been an error. Your transaction cannot be processed.

This is a "new" site just moved over from a different domain on my server, where it was running under another domain's Drupal 6.12 within a multi-site configuration.