Problem with playing large files

[Michel Perricaudet]

When I play large DSD single tracks (exceeding 1,4 Go) using MinimServer on my QNAP NAS to feed a dCs Vivaldi upsampled, the music stops after a definite lapse : 16mn 54 sec for a DSD 128, 33mn 48 sec for DSD 64 (obviously relating to the same size of file). My system isn't DSD 256 compatible, but I guess the problem would appear after 8 mn 27sec!
The music is cut and goes to the following track on the play-list.
Since no such problem occurs using Twonky Media, I guess there is something specific to MediaServer, or the way I use it.
Does somebody know of this issue and might provide some help? Thanks