Hi,On recent versions of Alfresco the workflow deployment servlet is disabled by default for security reasons. If you want to enable it add this to alfresco-global.properties:
system.workflow.deployservlet.enabled=true
This is only recommended on a development system, on production it is better to deploy the workflow using a workflowDeployer spring bean as described onhttp://wiki.alfresco.com/wiki/WorkflowAdministration#Manually_deploying_a_jPDL_XML_file_or_Process_A...