Problem runing the engine from workflow manager in Demantra/OAS server

Hi,I'm facing a problem executing the engine manager from the workflows administration page. this show a error in the log, but doesn't show something helpfull . here is the message from collaborator llog.

2011-11-11 19:45:27,325 GMT [WFProcess_10] ERROR dpweb.general: #################################### Step Failure. ####################################
2011-11-11 19:45:27,325 GMT [WFProcess_10] ERROR dpweb.general: Process ID:  781634
Schema ID:   1313
Schema name: 'Run Engine'
Step ID:     'Step2'
Step name:   'RunWindowsForecast'

Error description 'Process terminated with errors ,please check the process logs for more
information.'
2011-11-11 19:45:27,326 GMT [WFProcess_10] ERROR dpweb.general: ######################################################################################

in addition the process of import a file from workflow manager doesn't work, always show in the integration log "Rows Processed: 0" and dont bring any data to the database table.