Help!

Any ideas why this would stop playing 20 mins in?

General
Complete name : O:\Broadwalk Empire\Boardwalk.Empire.S02E04.720p.HDTV.x264-IMMERSE.mkv
Format : Matroska
Format version : Version 2
File size : 1.27 GiB
Duration : 58mn 54s
Overall bit rate : 3 077 Kbps
Writing application : x264.exe
Writing library : mkv2rls x264-tv version built on 2011. febr. 17
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 8 frames
Codec ID : V_MPEG4/ISO/AVC
Duration : 58mn 54s
Bit rate : 2 632 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.119
Stream size : 1.08 GiB (86%)
Writing library : x264 core 118 r2085+614 d1cc25d
Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / fade_compensate=0.00 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=36 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / fgo=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=crf / mbtree=1 / crf=18.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00
Language : English
Audio
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 58mn 54s
Bit rate mode : Constant
Bit rate : 384 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Compression mode : Lossy
Stream size : 162 MiB (12%)
Language : English

Probably because its a pirate copy. They tend to encode their copies in strange ways. You could try running it through mkvmerge.

Really? after having multiple issues with multiple files i have 3 thoughts, either this unit has an issue, or the firmware is messed up or the product is just isnt upto doing the job, i have used a Qnap 1000 for the last 12 months, but have upgraded due to network speeds, and before this an Egreat which never ever failed to play  a file, but was 2 years old and i wanted better network speeds.