Cannot connect to the web applications deployment base URL

[Dark Jem]

Hello,
I get the message Cannot connect to the web applications deployment base URL 
at the third step of the Jahia configuration wizard. I also get th message 
Cannot connect to your server base URL but I fixed it by adding /jahia after 
server_url in server.jsp .
It does not work if I do the same after webapps_deploybaseurl neither if I 
let the given path.

What Jahia is looking for when it looks for the webapps base url? Where can 
I find the code? Is there any error or something missing in my server. xml?

Thanks
J�r�mie
Here is my server.xml file :
<Server inet="0.0.0.0" port="10262" shutdown="SHUTDOWN" debug="0">
       <Service name="Tomcat-Standalone">
               <Connector className="org.apache.ajp.tomcat4.Ajp13Connector"
                       port="9114"
                       minProcessors="5" maxProcessors="100"
                       acceptCount="10" debug="0"/>
               <Connector 
className="org.apache.catalina.connector.http.HttpConnector"
                       port="7964"
                       minProcessors="5" maxProcessors="100"
                       enableLookups="false" acceptCount="10" debug="0"
                       connectionTimeout="60000"/>

               <Engine name="Standalone" 
defaultHost="pst-intranet.serv.priv.atos.fr" debug="0">

                       <Host name="pst-intranet.serv.priv.atos.fr" 
appBase="/MIDDLE/atos-mm/pst-intranet.serv.priv.atos.fr/to
mcat1/webapps" unpackWARs="true" debug="0">

                               <Logger 
className="org.apache.catalina.logger.FileLogger"
                                       directory="logs"  prefix="tomcat." 
suffix=".log" timestamp="true"/>

                               <DefaultContext crossContext="true"/>
                               <Context path="" docBase="ROOT" debug="10"/>
                               <Context path="/" 
docBase="/WEBS/mm/pst-intranet.serv.priv.fr/docs"
                                       crossContext="true" 
reloadable="false" workDir="logs/tomcat_work_bis" debug="10">
                                       <Resources allowLinking="true"/>
                               </Context>

                       </Host>
               </Engine>
       </Service>
</Server>
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