Codeigniter configuration

[eluser]gao[/eluser]
Hi everybody! In my codeigniter I have an index.php and an index_ws.php (the first one used to a normal http access and the second one to use like a webservice). I have separated my application directory in application_www and application_ws and I configured index.php to use the first application and index_ws.php to use the second application.

Now I want that if I go to the url www.domain.com use the index.php and if I go to www.domain.com/wsdl use the index_ws.php.

I think I have to rewrite the htaccess but I've tried it and I couldn't. Can anyone help me?

Sorry for my English!!

[eluser]Clooner[/eluser]
What is your htaccess code you already used?