Very interesting. Okay, well, first make sure that you're not using any firewall software on your PC that might be blocking and asking for confirmation. Then, give us a more detailed description of your network topology so that we can decide if the Linksys router is actually doing some kind of a block to the traffic.

Regarding where to put the files, if you put them anywhere on /drive0 then that's the music partition and they will not be erased when you do a software upgrade.

I personally put mine in a subdirectory of /drive0/var but you could put it in /drive0/ttsclock if you wanted. I don't know how that software works and whether it needs to be in a special folder in order to function, so I'd look at it more closely and find out.