I received a private message to a question I posted,  which led me to a link.  When I click on the link, there was content there yesterday but i has now disappeared and there is no way I can notify the sender that I have not been able to read the message and follow the instructions.  I have been instructed not to post new threads but I do now understand how I can communicate with the sender if I cannot reply to the messages.  Perhaps I am missing how this whole forum works.  Can someone please help.  Thank you.