Can you verify the port's status using some tool like Active Port?
I had similar issue. Later I found that Oracle listener had occupied that port.
Hope this will help you.
Try to telnet to that port from command prompt as
" telnet machineipaddress port#". If it opens a window then that port is used otherwise if you get not connected then it's not open. If nothing works then restart your computer and start jboss server first.
Hope this helps!