Jumpy/Choppy Video on Reporter 5.6

Need help with this intermittent problem:

FTR Reporter 5.6 was installed and 20% of the time works fine but on the other 80% the video shown by the player (while recording) is jumpy, choppy, like freezing for a moment any 2 or 3 seconds.

•     Even if I close the player video window, the video records are still jumpy (audio is perfect)

•     Not the FTR nor Windows show any significant error message

•     Tried all the possibilities on multimedia tab (NTSC, PAL etc). Same results

•     Tried to: disable some video features on Nvidia Panel, disabhttp://community.fortherecord.com/index.php?app=forums&module=post&section=post&do=new_post&f=91le Windows Aero, visual themes, desktop composition, ...high DPI settings, tried compatibility modes etc (could not disable hardware acceleration)

•     Tested cables and connections

•     On 10 tries, just closing and opening the software, 8 will have choppy video problems, the other 2 works perfectly.

Is there any registry config to solve this? Some incompatibility with the Quadro 2000?

Windows 7 – 64 Bits (Brazilian)

HP Z210 – Xeon E31240 3.30 GHz 8 Gb RAM (all drivers installed and updated)

NVidia Quadro 2000 - DirectX 11 - Driver NVidia 320.49

Pinnacle AV/DV (Which works fine on XP)

FTR Reporter 5.6.0.0 Build 118

FTR Player 5.6.2.0 Build 203

Anyone with similar problems?

Any hint is very welcome.