Are you using Win* and seeing a "port inuse" exception relatively early in the Jboss start messages?
Port 1099 or 1098 is probably in use by some other services. Check this and retry when those ports are not used.
Yes, I'm using Windows XP but there is not any application on port 1098 neither 1099. This problem occurs only when my application-policy is configured on jboss-web.xml.
Which files should be configured if I want to protect just my servlets and JSP (I am not using EJB)?