OK I did it,
I copy here the part of media portal log when I tried to see TVE 1:
2008-06-09 00:28:02.109375 [Info.][MPMain]: GUITVHome.ViewChannelAndCheck(): View channel=TVE 1 ts:False
2008-06-09 00:28:02.109375 [Info.][MPMain]: Recorder: Enabling DX9 exclusive mode
2008-06-09 00:28:02.109375 [Info.][MPMain]: Main: Received DX exclusive mode switch message. Fullscreen && maximized == True
2008-06-09 00:28:02.109375 [Info.][MPMain]: fonts.SetDevice()
2008-06-09 00:28:02.109375 [Info.][6]: Command: view tv channel:TVE 1
2008-06-09 00:28:02.109375 [Info.][6]: Recorder: find free card
2008-06-09 00:28:02.109375 [Info.][6]: Analysing Card 0
2008-06-09 00:28:02.109375 [Info.][6]: Card 0 can view channel TVE 1 recording=False
2008-06-09 00:28:02.109375 [Info.][6]: Analysing Card 1
2008-06-09 00:28:02.109375 [Info.][6]: Card 1 can view channel TVE 1 recording=False
2008-06-09 00:28:02.125000 [Info.][6]: Analysing Card 2
2008-06-09 00:28:02.125000 [Info.][6]: Card 2 can view channel TVE 1 recording=False
2008-06-09 00:28:02.125000 [Info.][6]: Command

top all card except card:0
2008-06-09 00:28:02.125000 [Info.][6]: Recorder: tv channel changed:TVE 1
2008-06-09 00:28:02.125000 [Info.][6]: teletext: clear teletext cache
2008-06-09 00:28:02.125000 [Info.][6]: Recorder: use free card SkyStar 2 DVB-S prio:10 name

kyStar 2 DVB-S
2008-06-09 00:28:02.125000 [Info.][6]: Recorder: start watching on card

kyStar 2 DVB-S channel:TVE 1
2008-06-09 00:28:02.125000 [Info.][6]: TVCapture: change channel to :TVE 1
2008-06-09 00:28:02.156250 [Info.][6]: DVBGraph: ShouldRebuildGraph(TVE 1) current ac3:False new channel ac3:False
2008-06-09 00:28:02.156250 [Info.][6]: TvCaptureDevice:RebuildGraph() Card:1 chan:TVE 1
2008-06-09 00:28:02.156250 [Info.][6]: DVBGraph: StopViewing()
2008-06-09 00:28:02.171875 [Info.][6]: planescene: PresentImage()
2008-06-09 00:28:02.171875 [Info.][6]: PlaneScene: PresentImage() dispose surfaces
2008-06-09 00:28:02.171875 [Info.][6]: planescene: PresentImage()
2008-06-09 00:28:02.171875 [Info.][6]: PlaneScene: PresentImage() dispose surfaces
2008-06-09 00:28:02.171875 [Info.][6]: VMR9: ReleaseComObject(): 0
2008-06-09 00:28:02.171875 [Info.][6]: planescene: PresentImage()
2008-06-09 00:28:02.171875 [Info.][6]: PlaneScene: PresentImage() dispose surfaces
2008-06-09 00:28:02.765625 [Info.][6]: TvCaptureDevice:RebuildGraph() recreate viewing graph
2008-06-09 00:28:02.765625 [Info.][6]: DVBGraph

tartViewing() TVE 1
2008-06-09 00:28:02.843750 [Info.][6]: VMR9: added Video Mixing Renderer 9 to graph
2008-06-09 00:28:02.859375 [Info.][6]: DVBGraph: tuning details: frequency:10817000 kHz polarisation:1 innerFec:0 symbolrate:22000 ONID:1 TSID:1056 SID:29957 provider:TVE 1
2008-06-09 00:28:02.859375 [Info.][6]: added filter:MPV Decoder Filter to graph
2008-06-09 00:28:02.984375 [Info.][6]: added filter:CyberLink H.264/AVC Decoder (PDVD7.x) to graph
2008-06-09 00:28:02.984375 [Info.][6]: added filter:MPA Decoder Filter to graph
2008-06-09 00:28:02.984375 [Info.][6]: add filter

efault DirectSound Device to graph clock:False
2008-06-09 00:28:02.984375 [Info.][6]: DirectShowUtils: found renderer - Default DirectSound Device
2008-06-09 00:28:03.312500 [Info.][6]: DirectShowUtils: Passed removing audio renderer
2008-06-09 00:28:03.312500 [Info.][6]: DirectShowUtils: Passed finding Audio Renderer
2008-06-09 00:28:03.312500 [Info.][6]: planescene: PresentImage()
2008-06-09 00:28:03.312500 [Info.][6]: PlaneScene: PresentImage() dispose surfaces
2008-06-09 00:28:03.328125 [Info.][6]: planescene: PresentImage()
2008-06-09 00:28:03.328125 [Info.][6]: PlaneScene: PresentImage() dispose surfaces
2008-06-09 00:28:03.343750 [Info.][6]: DVBGraph: channel TVE 1 uses MP2 audio
And this is the error log:
2008-06-09 00:27:29.546875 [ERROR][6]: CaptureCard B2C2 MPEG-2 Source NOT supported, no definitions found.
Thank you