Failed to build body from bytes

[babu79]

My activeMQ version is 5.2.0 which is embedded inside Jboss4.2.2.Ga. when i
am sending an object message Using Active producer inside a servlet i am
getting the following exception 
 Failed to build body from bytes. Reason: java.io.IOException: No
ClassLoaders found for: com.corpus.biemedia.servlet.MailEx 
Here is my MailEx source code

public class MailEx implements Serializable {

        /**
         * 
         */
        private static final long serialVersionUID = 1L;

        public String fromId;
        public String toId;
        public String subject;
        public String body;

        public String getFromId() {
                return fromId;
        }

        public void setFromId(String fromId) {
                this.fromId = fromId;
        }

        public String getToId() {
                return toId;
        }

        public void setToId(String toId) {
                this.toId = toId;
        }

        public String getSubject() {
                return subject;
        }

        public void setSubject(String subject) {
                this.subject = subject;
        }

        public String getBody() {
                return body;
        }

        public void setBody(String body) {
                this.body = body;
        }

}

    Here  is my MDB

public class ActiveMDB implements MessageListener {

        public void onMessage(Message arg0) {

                MailEx mail=null;
                ObjectMessage obj=null;
                
                try {

                        if (arg0 instanceof ObjectMessage) {
                                obj = (ObjectMessage) arg0;
                                mail=(MailEx)obj.getObject();
                                }
                        SendMail.mail(mail);
                } catch (Exception e) {
                        out.println(e.getMessage());
                }
        }
}
     
But when i am running stand alone Active Producer.I am not getting this
exception?In both the cases I used same jars.
Please provide links regarding Types of messages we  can use in jms.
Any help?thanks in advance.


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