You should prepare a "data source configuration" deployment file.

Those files are deploying by dropping them in the "deploy" directory of your running AppServer as usual. As far as I know They must end with "-ds" suffix. For example:

myapp-ds.xml

For MySQL, a practical example can be:

<?xml version="1.0" encoding="UTF-8"?>

<!-- ========================================== -->
<!-- -->
<!-- JBoss Server Configuration -->
<!-- -->
<!-- ========================================== -->

<!-- ========================================== -->
<!-- Datasource config for MySQL -->
<!-- ========================================== -->

<datasources>
 <local-tx-datasource>
 <jndi-name>MyAppMySQLConnection</jndi-name>
 <connection-url>jdbc:mysql://localhost/mysqldatabase</connection-url>
 <driver-class>org.gjt.mm.mysql.Driver</driver-class>
 <user-name>mysqluser</user-name>
 <blocking-timeout-millis>500</blocking-timeout-millis>
 <password>mysqlpassword</password>
 </local-tx-datasource>
</datasources>

Hi,
with version of the mysql jdbc driver do you use ?
Have you place it in the /server/default(or?)/lib/ directory ?
Ev. try:
<driver-class>com.mysql.jdbc.Driver</driver-class>

Hi again,
I think that in your "com.mysql.jdb.Driver" a 'c' is missing in the .jdb.

Re your sure that com.mysql.jdbc.Driver is driver class for MySQL JDBC's implementation?

As fbiaggi stated, make sure that driver's jar is in:

$JBOSS_HOME/server/default/lib directory "before" you start JBOSS.

Hope this helps.

Can you post your "-ds.xml" file?

Hi,
this seem to be an authorisation or connection problem.
Are you using a local or remote instance of mysql ?
To test it edit the user table in the mysql database (ex. with mysql query browser),
open a new user with an empty host/userid/password and give Y to all privililedges.
Restart mysql and retry, if now works you have found the problem.

Good,
pay attention that your mysql is now open to all users on any system with all auth.