mod_rewrite: redirect webdav requests
===

I have configured httpd.cfg
***
RewriteEngine On
RewriteBase /		
RewriteRule ^port([0-9]*)(.*) `https://IP:$1$2` [NC,L]
***

usual requests(GET/POST) redirect correctly. but when i try to redirect webdav
i get errors. 
httpd-access.log: 
 127.0.0.1 - - [10/Jul/2012:15:13:37 +0400] "GET /port11001/HOME/ HTTP/1.1" 302 213
httpd-access.log: 
[Tue Jul 10 13:07:27 2012] [error] [client 127.0.0.1] File does not exist: /var/www/port11001 

browser log:
OPTIONS `https://IP:8080/port11001/HOME/` HTTP/1.1
Access-Control-Request-Method: PROPFIND
Origin: `https://IP:11001`
Access-Control-Request-Headers: origin, content-type, depth

Origin: should be h`ttps://IP:11001/HOME`

so anyway, it not redirect correctly. Any idea how to solve it?
maybe anyone had similar problem?
Thank you.