I doubt this has to do with JBoss. I would check any restrictions set at your OS level here.
If thats no good though, jboss-2.2.4 is VERY old. Grab at least the latest 2.4 version
I had the same problem several days before. Now this question had been resolved. You can tune the configuration file the name is tomcat41-service.xml.
You can increase the maxProcessors and acceptCount.