Hi!
I have a big problem and i don't understand why i can't debbug my project...
I have Apache 2.2.4 and php 5.2.1.
The settings are the following :

Project -> Project Properties -> Properties:

Root directory: C:\www\sfprojects\dev
Source control: None
(Publishing section is completely empty)
Run mode: HTTP mode (3rd party WEB server)
Root URL: http://mywebserver
Remote root directory: C:\www\sfprojects\dev

Project -> Project Properties -> Mapping:
Remote directory : C:\www\sfprojects\dev
Local directory : C:\www\sfprojects\dev
URL : http://mywebserver

and my file ".conf" is :

<Directory "C:\Program Files\wamp\php\PEAR\data\symfony\web\sf">
AllowOverride All
Allow from All
</Directory>

<VirtualHost *:80>
ServerName dev.com
DocumentRoot "C:\www\sfprojects\dev\web"
DirectoryIndex index.php
Alias "\sf" "C:\Program Files\wamp\php\PEAR\data\symfony\web\sf"

<Directory "C:\www\sfprojects\dev\web">
AllowOverride All
Allow from All
</Directory>
</VirtualHost>

and when I lunch the DBG (F9), I have the following message :
Failed to map "c:/Program Files/wamp/php/Pear/symfony/symfony.php" remote file to local file system.

and i don't understand why...
have you some suggestions ?
thanks!

please compare the two lines below:

C:\Program Files\wamp\php\PEAR\data\symfony\web\sf <- it's from your web config
C:\Program Files\wamp\php\PEAR\symfony\symfony.php <- it's what you're trying to run.

How to understand this?

Moreover, your project settings has no relation to C:\Program Files\wamp\php at all...
Please check with this FAQ post for further details: howto-set-project-mapping-t2135.html