Problem with mod_proxy_ajp with apache2.2+tomcat5.5

Hi to all!
i'm newbie and this is my first question.

I have one problem when go to one link, my problem is
something put a 
duplicated component into the url, exemple:

The link url is: http://
www.myportal.com/myapp/portal/intranet
and, when i click on it, the browser show this error:
http 404 - /myapp/myapp/portal/intranet  (/myapp is
duplicated)
Configuration only to describe the problem(complete config
is down of 
message):
With this VirtualHost config, i can see the first page of 
my portal but 
not correctly, only partialy:

<VirtualHost *>
    ServerName www.myportal.com  
    ProxyRequests Off
    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>  
   ProxyPass / ajp://192.168.0.100:8009/myapp/  (this ip is
my local ip 
becuase i'm testing with two machines in the same LAN)
   ProxyPassReverse / ajp://192.168.0.100:8009/myapp/
</VirtualHost>

I see if in my VirtualHost config i change the url specified
in:
ProxyPass / ajp://192.168.0.100:8009/myapp/
to, for example:
ProxyPass / ajp://192.168.0.100:8009/myapp without ending
"/", the first 
page isn't showed, and shows this error:
http 404 - /myappmyapp/
its the same than the first error but without the middle
bar, but now 
it's showed in the first page too.

I'm using:

- apache2 - 2.2.3
- Tomcat-5.5.20
- mod_proxy
- mod_proxy_http
- mod_proxy_ajp
- Ubuntu 6.10
- Portal builded with jetspeed2

My config is:

All used modules enabled into /etc/apache2/mods-enabled/
The site enabled too into /sites-enabled/

Into the site is specified the virtual host:

<VirtualHost *>
    ServerName www.myportal.com  
    ProxyRequests Off
    <Proxy *>
        Order deny,allow
        Allow from all
    </Proxy>  
   ProxyPass / ajp://192.168.0.100:8009/myapp/  (this ip is
my local ip 
becuase i'm testing with two machines in the same LAN)
   ProxyPassReverse / ajp://192.168.0.100:8009/myapp/
</VirtualHost>

My application is situated into /TOMCAT_HOME/webapps/myapp/

If you need more details, please, answer to me.

I need your help!!

Thanks in advance!!

Adolfo.

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