Missing variables via URL

[eluser]rmartinez[/eluser]
Hi everybody,

When I write a url like http://midominio.com/auth_other/l?oauth_...fier=08666, the url chagnes to http://midominio.com/auth_other/l automatically, why? However, if I write http://midominio.com/auth_other/l?oauth_...riable=999, it works fine, ??

My config.php file:
$config['index_page'] = '';
$config['uri_protocol'] = 'PATH_INFO';
$config['permitted_uri_chars'] = 'a-z 0-9~%.:_\-\?\=\#\&';
$config['allow_get_array'] = TRUE;
$config['enable_query_strings'] = FALSE;
$config['global_xss_filtering'] = FALSE;

Mi htaccess file:
RewriteEngine on
RewriteCond $1 !^(index\.php|images|captcha|pruebas|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

Thanks.

Regards.