Problem mit Tomcat + Apache + mod_webapp

[Flightbase]

Moinsen!
Ein arbeitskollege von mir hat folgendes problem... ich bin mal so frei das in englisch zu posten. wenns jemand nicht verstehen sollte, dann übedrsetz ich es zur not.:

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i am trying to integrate apache and tomcat in linux with mod_webapp.so. in my linux system i have 2 network cards and 2 separate IP address
123.456.789.1 and 987.654.321.1

i installed everything and also i added following lines in httpd.conf

Servername 123.456.789.1

LoadModule webapp_module modules/mod_webapp.so
AddModule mod_webapp.c
And the end of the file you must add these lines:
WebAppConnection connection warp 123.456.789.1:8008
WebAppDeploy examples connection /examples
WebAppDeploy testApplication connection /testApplication


>>after this i restarted tomcat and apache.
when i try to use a html page with http://123.456.789.1/testApplication/servlet/testServlet i am getting following error
mod_webapp(warp) error
unable to connect (-2) to host:123.456.789 port:8080

and when i see the apache error log file i am getting an error like the following
Cannot retrieve hostID for http://123.456.789.1:80
No RID(-1)
Invalid RID 256 excepted 0
and
in tomcat eroor log file the following message
Exception in Socket
java.net.SocketException: Broken Pipe

but without apache it is working fine(directly connection to tomcat)
when i try to use the same html page with http://123.456.789.1:8180/testApplication/servlet/testServlet i am getting the results.

thanks in advance
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wie schon gesacht... danke im vorraus!

greets, Nik