[Ramin Soh]

Thanks Vince.

The problem is exacly what you said.
I use the same monitor in editin and I have with hdmi conected monitor so 2 monitors.

All of my videos dosent show, some frames as you sed and the black. But when I render videos and the line is green the videos playback fine no problem.

Is there codec I can download. I just installer windows 7
I have Asus P8Z68-V LX motherboard and I downloaded Intel Graphics Accelerator Driver V8.15.10.2598 for Windows Win7 64bit.

I you have any idea please let me know.

thanks a lot