Debug mapping problem

I faced a problem creating debug configuration for xdebug.

My webserver is on remote host and i have access to it thru mounted drive.

Path to project root on mounted drive:

D:\Projects\myproj

Path to project root on remote server:

/home/disk/myproj

Virtual server's root folder (DocumentRoot of VirtualHost on remote host's apache) is set to /home/disk/myproj/web. It corresponds to

D:\Projects\myproj\web 

on mounted folder.

The web server's URL root is

http://192.168.56.2:81

I can't map paths when virtual server's root folder is different from  project root. When i start debugger i see "Connected" message but breakpoints do not work.

I'm using PhpStorm EAP 98.521 on Windows 7.

Any help appreciated!