Hello,

You need to have an entry in "server.xml" of Tomcat for the context you 
have created. If you have already created this, then check whether there 
is an entry for the specific integration module (either mod_jk or webapp 
between Apache & Tomcat) for dispatching request of servlet to Tomcat by 
Apache.
For instance, for jk_module, in Apache's httpd.conf file, there has to be 
a following entry :

JkModule /servlet/* apj13

Hope it helps.

Soumen Ghosh