I'm running TwonkyVision version 
4.4.6 on my Buffalo Linkstation PRO 500GB with stock firmware 
V1.11 to stream music to my Roku Soundbridge M1001 
V3.0.44 client. The Twonky server generally works fine. But i have got a problem to use the Linkstation as normal NFS when TwonkyVision is running. I shared two folders and mapped them as drive m: and n: in the Windows Explorer. When i want to acess to the mapped drives the connection breaks down after a short time. I could reconnect them but the connection will be truncatated again and again. The Soundbridge could be switched off, it suffices when only the Linkstation is powered up. The Twonky server could be in idle mode (no music stream active).
I found out that when TwonkyVision 
is not started (disable the command "twonky start" in the file /etc/init.d/) there is 
no problem to acess the mapped drives. The connection is stable. It seems that the Linkstation hasn't got enought CPU-Power. 
Does anybody have got the same problem or better a solution  
 
Peter