Tomcat - ADS connection reset - communication exception

Hi Friends, I'm using tomcat 5.5.28 and ADS on Windows 2003 Server and connecting through realm configuration mentioning in the server.xml. Things are fine but the problem arise when the server use to be idle for a couple of mins(normally 10 to 15 mins). When I saw in the log, I found that

Problem with connectivity of web application with siebel(that sits behind firewall)

Hi All, We have a web application that communicates with siebel server 7.5.3. There is a firewall between web server and siebel server.When we start our web application it works fine but after sometime connection request to siebel fails.Session timout value for TCP connections on firewall is 3