Check out Quadravox.com for a low cost ISD programmer (IQBox) that performs well. From what I hear, ISD is having problems with their programmer. I received upgrade to my IQBox so that it will handle the new 4000 series of devices. Thanks, Bob Carter, design engineer Wildlife Materials, Inc. 1031 Autumn Ridge Road Carbondale, IL 62901 voice (618) 549-6330 (ext. 225) fax (618) 457-3340 email wolftech@midwest.net www www.wildlifematerials.com