error when redeploying seam application

[ms57]

hello every one
i am developping an application that simply connects to MYSQL and register
user profiles in a table.i use 'jboss-4.0.4.GA' app server and seam framework
with JSF components. when my .ear file doesent exist in 'deploy' subdirectory
in jboss root folder ican deploy my app successfuly.but when i change some
configuration files and try to redeply, the follwing error is reportedto me:


You are trying to use a connection factory that has been shut down: ManagedConnectionFactory is null.; - nested throwable: (javax.resource.ResourceException: You are trying to use a connection factory that has been shut down: ManagedConnectionFactory is null.)

here is my *-ds.xml file setting:



<local-tx-datasource>
<jndi-name>bookingDatasource</jndi-name>

<connection-url>
jdbc:mysql://localhost:3306/booking?autoReconnect=true&amp;useUnicode=true&amp;characterEncoding=UTF8
</connection-url>


<driver-class>com.mysql.jdbc.Driver</driver-class>
<user-name>root</user-name>
myroot




</local-tx-datasource>



so what happend fo my connection to database?
& what should i do to get successed?

thanks for any feedback.
mahdi

[gavin.king]

This happens to me too. I don't think it is a big deal, I just ignore it.