I got it to work -- but it is a bit tedious. Try this: skip forward through the early screens getting you to subscribe to random sites. Then, with the "+" icon, add this site by its full name: "iliasm.freeforums.net". It prompted me for my login and password here, which I gave.
(UPDATE: don't forget our new URL is: "iliasm.org".)
Now I can browse the forum from my phone, and it is alerting me when I get "likes" and PMs... so I guess it worked.
I have the app installed and somehow managed to find my way to the ILIASM! Don't ask how I did it, because I think I went the scenic route.
I know! And: the app ("Tapatalk") looks nothing like the FreeForums site. However, all the same elements are there: The "General" category holds all the "Boards" which hold the "Threads" which hold the "Posts". You can read, "like", etc. You can also be alerted (on your smartphone) when others "like", quote, or reply to your posts.
Maybe I've posted one or two simple comments from the app, and clicked "like" a few times. But mostly if some one replies to me and I feel it deserves a response, I head to my PC to type up a proper one.
Which, now that I think about it, is pretty much how I used the EP app.