Almost every time I have tried to use the Interchange section of RYPN over the last few months I will have the screen blank out with the message "Service Unavailable" after viewing a few posts. Reload does not work, I have to close out and come back until it happens again. This happens on two different computers, one with IE and the other with Mozilla. Is there a setting I need to change or is something else at work here?

No, it's bandwidth limitations on the part of our ISP--just too many readers, nothing on your end. Hume is working on moving the Interchange to a server with increased capacity as part of the larger move to make the entire six-year Interchange archive available online. The work is supported in part by a generous grant to RyPN Inc. from the Amherst Railway Society.