Ohhh :( It seems your using old version on jBPM. I am using jBMP4.3 version.
i saw your mail properties file which is
jbpm.mail.transport.protocol=smtp
jbpm.mail.smtp.auth=false
jbpm.mail.smtp.host=xx.xx.xx.xx
jbpm.mail.smtp.port=25
use this
mail.smtp.host mail.YOURHOST.com
mail.smtp.port 25
mail.smtp.auth false
Dont give = sign in this properties file..
We are using process in ZK framwork so we have WEB_INF folder for UI part we keep all process file in that folder... its not neccessory actually..
try given code