I ask for some help on basic management of glassfish with mysql.

here is what I have done:
I downloaded glassfish, unpacked it in /Users/(myname)/Downloads (I'm on
macos X.5), then I installed mysql with the plugin for the "system
preferences".I ran mysql from it (the "system preferences") and I
obtained a message telling me that mysql is well launched.
then, I entered the command "ant -f setup.xml" in order to configure
glassfish.
I successfully launched the "domain1", and created a personal domain.

I ran the following task:


<target name="start-domain" description="starts application server
petstore domain" depends="check">

<echo message="Starting ${application.name} domain for
${glassfish.home}"/>

<exec executable="${asadmin}" failonerror="true"
dir="${glassfish.home}">

<arg line=" start-domain"/>

<arg line=" --echo=${echo}"/>

<arg line=" ${application.name}"/>

</exec>

</target>

but the following command makes an error:


<target name="start-db" description="starts the databse server."
depends="check">

<exec executable="${asadmin}" failonerror="true"
dir="${glassfish.home}">

<arg value="start-database"/>

<arg line=" --echo=${echo}"/>

<arg value="--dbhost=${db.host}"/>

<arg value="--dbport=${db.port}"/>

<arg value="--dbhome=${derby.home}"/>

</exec>

</target>

this previous command generates this line:

start-database --terse=false --dbhost localhost --dbport
3306 --echo=true --dbhome /Users/oliviersaint-eve/Downloads/glassfish/javadb


the error (catched in derby.log) is: unable to listen on port 3306 on
host localhost.

do you know what's going wrong?