I am sorry, but I do not exactly understand what your husband or you have done and what happens. The more precise you explain the better. And if your husband set up the server then he would be better at explaining what he did to set up the server.
BUT MOST IMPORTANT: Please post logfiles of the server and client from the same session (logfiles have the date of creation in their name) to pastebin and post a link to those files here in the forum. This is explained in https://community.7daystodie.com/topic/3956-how-to-report-an-issue-please-read-before-creating-new-threads/