請問LE5500系列播影片的問題

小弟的是55LE5500，有時候懶的開HTPC就直接把USB硬碟插上電視來看影片，可是奇怪的是，有些mkv可以正常的播放，有些則會反覆的出現"下載中"，就無法播放了，還有一次播到一半當掉的..@@"
雖然看了官方支援的文件，說不見得每種編碼模式的mkv都可以播，而以下兩個mkv影片的編碼訊息，第一個是可以播的，第二個是不能播放的，但小弟看不出來有啥不一樣(只有第一個影片有兩個音軌，字幕應該不重要)

第一個：
General
Format : Matroska
File size : 12.0 GiB
Duration : 1h 58mn
Overall bit rate : 14.5 Mbps
Encoded date : UTC 2011-04-01 22:21:11
Writing application : mkvmerge v2.3.0 ('Freak U') built on Sep 8 2008 18:32:16
Writing library : libebml v0.7.7 + libmatroska v0.8.1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Muxing mode : Container profile=Unknown@4.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 58mn
Bit rate : 12.4 Mbps
Width : 1 920 pixels
Height : 800 pixels
Display aspect ratio : 2.40:1
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.335
Stream size : 10.0 GiB (83%)
Title : The.Green.Hornet.2011
Writing library : x264 core 114 r1924 08d04a4
Encoding settings : cabac=1 / ref=5 / deblock=1:-3:-3 / analyse=0x3:0x113 / me=umh / subme=10 / psy=1 / psy_rd=1.05:0.10 / mixed_ref=1 / me_range=48 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=2 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=12 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=6 / 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=2pass / mbtree=1 / bitrate=12350 / ratetol=1.0 / qcomp=0.70 / qpmin=1 / qpmax=63 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=40000 / vbv_bufsize=30000 / nal_hrd=none / ip_ratio=1.40 / aq=1:0.80
Language : English

Audio #1
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Mode extension : CM (complete main)
Codec ID : A_AC3
Duration : 1h 58mn
Bit rate mode : Constant
Bit rate : 640 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Stream size : 544 MiB (4%)
Title : English AC3
Language : English

Audio #2
ID : 3
Format : DTS
Format/Info : Digital Theater Systems
Codec ID : A_DTS
Duration : 1h 58mn
Bit rate mode : Constant
Bit rate : 1 510 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 1.25 GiB (10%)
Title : English DTS
Language : English

Text #1
ID : 4
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : Nederlands SRT
Language : Dutch

Text #2
ID : 5
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : English
Language : English

第二個：
General
Format : Matroska
File size : 1.36 GiB
Duration : 1h 25mn
Overall bit rate : 2 280 Kbps
Encoded date : UTC 2011-01-22 15:03:31
Writing application : mkvmerge v3.4.0 ('Rapunzel')
Writing library : libebml v0.8.0 + libmatroska v0.9.0
Video #1
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 5 frames
Muxing mode : Container profile=Unknown@4.1
Codec ID : V_MPEG4/ISO/AVC
Duration : 1h 25mn
Bit rate : 1 787 Kbps
Nominal bit rate : 1 835 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate : 23.976 fps
Resolution : 8 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.081
Stream size : 1.07 GiB (78%)
Writing library : x264 core 112 r1867 22bfd31
Encoding settings : cabac=1 / ref=5 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=7 / psy=1 / 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=6 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=1835 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Language : English
Audio #2
ID : 2
Format : AC-3
Format/Info : Audio Coding 3
Codec ID : A_AC3
Duration : 1h 25mn
Bit rate mode : Constant
Bit rate : 448 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Surround: L R, LFE
Sampling rate : 48.0 KHz
Stream size : 274 MiB (20%)
Title : 法語
Text #3
ID : 3
Format : UTF-8
Codec ID : S_TEXT/UTF8
Codec ID/Info : UTF-8 Plain Text
Title : 中文

唯一看到有可能的，是mkvmerge的版本不一樣，難道較新版的mkvmerge製作出來的mkv會讓LE5500不支援囉？
還請各位大大看看，謝謝。