haproxy url based routing not forward

I have a little problem with my haproxy config. I would like that if the URL : http://myserver.com/style/ is called always redirects to another backend. Here it should be no matter what is called it should always be forwarded everything that concerns the folder /style/.

My config

frontend ft_web
 bind *:80
 default_backend bk_web
 acl url_style path_beg -i /style
 use_backend web_style if url_style
 reqadd X-Forwarded-Proto:\ http

backend bk_web
 server jenkins1 10.100.100.5:8080 check
 server jenkins2 10.100.100.6:8080 check backup

backend web_style
 server web1_stlye 10.0.0.5:80 check