When you define node parameters, these parameters are stored in an extra file in the same directory the job chain is stored. When executing the job remotely with a JobScheduler Agent, this file is not available. If you want to use node paramters for a step which is executed remotely then it is neccessary to have at least one locally executed step with node parameters before. If you have no local step before, please add a dummy node before the remote node and assign a dummy parameter to this step.
You can download a example from here. Please modify in the example configuration the process class to fit to your environment.