DB Connection Issue after upgrade from v5r2 to v5r3

Ok, this is my last hope. I had written some java code a couple of years
back when I was a consultant. They upgraded in December from v5r2 to
v5r3. Since the upgrade the java program cannot connect to the DB which
is on their production box. When using the following code, we got the
error "The application requester cannot establish the connection"

DriverManager.registerDriver(new com.ibm.as400.access.AS400JDBCDriver());
con = DriverManager.getConnection(driver, username, password);
stmt = con.createStatement();

The driver was using the name of the URL it had always been using. So I
then switched the the driver to be the IP address and we got the following
error: "The application requester cannot establish the
connection.(operation timed out"

So then I added the following code before it registers the driver:
"System.out.println("check=" + DriverManager.getDriver(driver));" and get
the following error now: "No suitable driver "

The client contacted IBM in the beginning before we changed it to the IP
address and IBM was no help. They came back saying "It looks like the
servlet is running, and encountering a problem making a data connection to
another system, or to a 'remote' database. " Well, yeah, we know that,
but WHY?

Again - this code worked correctly on Tomcat server on v5r2, the client
then upgraded to v5r3 and it hasn't worked since.

Any help is greatly appreciated!

Thank You,
Kara



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