Total Newbie - Apologies in Advance

[gnomus]

Sorry to keep bothering folks with this, but it seems that I am still having problems getting all of my "boxes" to talk to one another reliably.

Most of the time, it works quite well. However, I had a "loss of NAS" issue yesterday - described here.

My current arrangement is: Linn DS and NAS connected to a switch; switch connected to the BT (v4) Router via BT Homeplugs. I'm at a bit of a loss to know how to proceed. Do I need a better router (if so, which one)? Do I need better homeplugs (if so, which ones)? Or should I buy another router and have DS, NAS and Router(2) all physically connected to one another, but with no internet connection (unless router 2 can talk to router 1)?