.htaccess rewrite with 404 error

I like this rewrite, but this drop error.


<IfModule mod_rewrite.c>

RewriteEngine on


RewriteRule (.*)assets/kepek/(.*) $1index.php?r=watermark/watermark&file=$2


</IfModule>

This drop error404:


2012/05/21 19:06:23 [error] [exception.CHttpException.404] exception 'CHttpException' with message 'Unable to resolve the request "assets/kepek/7a720a3cd22d2aed261b05d03d74dd87.jpg".' in D:\munka\web\yiiframework\web\CWebApplication.php:280

Stack trace:

#0 D:\munka\web\yiiframework\web\CWebApplication.php(135): CWebApplication->runController('assets/kepek/7a...')

#1 D:\munka\web\yiiframework\base\CApplication.php(162): CWebApplication->processRequest()

#2 D:\munka\web\projekt\index.php(13): CApplication->run()

#3 {main}

REQUEST_URI=/assets/kepek/7a720a3cd22d2aed261b05d03d74dd87.jpg

---

2012/05/21 19:06:26 [error] [exception.CHttpException.404] exception 'CHttpException' with message 'Unable to resolve the request "assets/kepek/7a720a3cd22d2aed261b05d03d74dd87.jpg".' in D:\munka\web\yiiframework\web\CWebApplication.php:280

Stack trace:

#0 D:\munka\web\yiiframework\web\CWebApplication.php(135): CWebApplication->runController('assets/kepek/7a...')

#1 D:\munka\web\yiiframework\base\CApplication.php(162): CWebApplication->processRequest()

#2 D:\munka\web\projekt\index.php(13): CApplication->run()

#3 {main}

REQUEST_URI=/assets/kepek/7a720a3cd22d2aed261b05d03d74dd87.jpg 

What make i bad?