This is a jboss applicationserver issue. Not a jBPM problem. Please use their forums. Since you do get a connection with telnet, it is most likely not even a jboss AS problem.
Thanks Ronald for pointing me in the right direct. I've posted to the JBoss AS Beginners forum.
I am also facing the same issue while connecting to 1099 port for our application. Please let me know the steps to resolve the same.
Thanks in Advance
have you read my answer 2 years ago? you know... the one to posts above?