Problems with tv.channel (shuttering?) (1 Viewer)

[khael]

TV-Server Version:
MediaPortal Version: 1.0.0.0
MediaPortal Skin: default wide
Windows Version: Vista SP1 x64
CPU Type: Intel core I7 @ 3.6ghz
HDD: 2*160gb sas seagate 15k.5
Memory: 6gb ddr3 1600mhz cl8
Motherboard: X58 intel
Video Card: HD 3870
Video Card Driver: Ati 9.2
Sound Card:
Sound Card AC3:
Sound Card Driver:
1. TV Card: Hauppauge hvr-1100
1. TV Card Type: DVB-T
1. TV Card Driver:
2. TV Card:
2. TV Card Type:
2. TV Card Driver: another dvb-t card
3. TV Card:
3. TV Card Type:
3. TV Card Driver:
4. TV Card:
4. TV Card Type:
4. TV Card Driver:
MPEG2 Video Codec:
MPEG2 Audio Codec:
h.264 Video Codec:
Satelite/CableTV Provider:
HTPC Case: Armor
Cooling: Liquid cooling
Power Supply: Modu 85+ 620w
Remote: MCE Remote Controller
TV: HP w2408h
TV - HTPC Connection: HDMI

i need help
i have a tv server with 2 ddt tuner
and 3 mediacenter.

I have a shuttering problem with audio (and sometimes with video).
video signal and quality is over 90%

the problems is with both tuner!
bye