What version of the EPAgent? Is there anything that gets written to the EPAgent log?
Check if the epagent\conf\EPAService.conf is set up correctly, especially the path to the properties file, the epagent.jar file, the wrapper.jar file, the path to your Java home is correct. IIRC, it uses JAVA_HOME, so make sure that is set in your environment variables.
You may want to upload those files here.