Problems playing mp4 and aif files

[The Pied Piper]

Simon,
I set up Minimserver last night on a QNAP ts-212 (ARM). I followed your instructions carefully, setting up Java first, and everything seemed to be set up fine. I also set up Minimwatch on my mac and was allow to tweak settings. I like the flexibility of the views and ability to tweak, especially after grappling with Twonky's inability to let me edit trees easily (rescued only by 'Brian' via Linn forum).

I am streaming to a Naim Uniqute 24/96. Flac and wav work but mp4 (compressed) and aif do not play (the stream just stops). My naim will not stream ALAC (mp4 lossless). Nothing is written to the Minimserver log and the naim just displays 'cannot play'.
mp4 and aif do stream successfully via Twonky.
I have tried the same track as mp4, aif, FLAC and mp3 and only the FLAC and mp3 play.

I can't see anything in the forums so I am unsure whether this is a bug, Apple, naim, the QNAP or me! But as Twonky plays aif and mp4, perhaps it is something to do with Minimserver or my Java set up (I have tried both Java 7 and 6)

Thanks for any help.