Ajp13 help needed.

[Simon Lam]

Hi! All.
I got the following error in mod_jk's error log when trying to use Ajp13. Does anyone 
know what may be the cause of the error?
Thanks in advance.

[jk_connect.c (143)]: jk_open_socket, connect() failed errno = 111
[jk_ajp13_worker.c (173)]: In jk_endpoint_t::connect_to_tomcat, failed errno = 111
[jk_ajp13_worker.c (584)]: Error connecting to the Tomcat process.