knowledgebas url problem

[BehineData]

hi

 

I enable seo kb in setting of whmcs in general section.also i change htaccess.txt to .htaccess

 

now i have problem with urls .default language of my site is Persian and i want to use Persian url in Kb url's.

 

now my htaccess have this code :

 

# Knowledgebase

RewriteRule ^knowledgebase/([0-9]+)/[a-z0-9_-]+\.html$ ./knowledgebase.php?action=displayarticle&id=$1 [L,NC]

RewriteRule ^knowledgebase/([0-9]+)/([^/]*)$ ./knowledgebase.php?action=displaycat&catid=$1 [L,NC]

RewriteRule ^knowledgebase$ ./knowledgebase.php [L,NC]

 

 

this is my urls now :

 

http://www.behinedata.com/knowledgebase/11/---FTP--Cpanel.html

 

in this url --- is persian title of kb page but it's show --- !

 

it must be :

 

http://www.behinedata.com/knowledgebase/11/نحوه ساخت اکانت FTP در Cpanel.html

 

please help me how to use persian urls in my site ?

 

thanks