This is a bit difficult to describe precisely, but hoping someone can give me some pointers.
When I first used FB2Km (is that an ok abbreviation?) on my iPad, I was pleasantly surprised to see my desktop Logitech Media Server listed under Local Network. It was just there - and it worked, I could play songs off my desktop.
Then a few days later it disappeared.

My problem is that Im no sure what I did (if anything) for it to appear or disappear. The one thing that is probably relevant is that for a number of reasons I would have been switching networks on iPad and desktop ( i have 2 basically, with 2.4 and 5g on each of course and also a range extender).
I have tried all combinations of the networks on desktop and ipad but nothing seems to bring it back.

One thing that is odd, is that when I look in the LMS info it shows its IP address as fixed regardless of which network (router) the desktop is on. But specifically putting the ipad on the same network doesnt help.
Also if I put the IP address for LMS and port 9000 into the User-Specified Servers list explicitly, that doesnt work either.

FTP server (using Filezilla client) works just fine.

Does any one have any ideas?