Problem with connection pool

[David DELGRANCHE]

        Hi all,

        I'm using tomcat 3.2.1 with Apache. When I try running a servlet which 
makes an Oracle access, I have a 503 error telling me that it's impossible 
to create the connection pool.  My DB is on another server. Does this can 
be the problem? Does anyone already had this type of problem?
        thanks for help
        David.