The REPLY button is only displayed if you are currently logged in to JewishGen.
If you are merely viewing displayed messages while not logged in, this button is not displayed.
After logging in, you must re-open the message or group of messages you received from JewishGen.
If you simply re-display webpage that did not have the button, it still will not be there.
That webpage was not changed when you logged in.
If you re-open the message(s) from JewishGen after logging in, the REPLY button should be displayed under every message.