Error with FS recorder

Hi all.

I've been building for new PC to run my new PMDG smoothly.

I also like to try make some video's for fun.

So I've been trying to make a small video of my PMDG737ngx with FS recorder.

When I select record, a popup screen appears where you choose the info how the FS recorder should record.

When the screen returns some of the scenery is missing and sometimes the aircraft it selves.

Sometimes FSX crashes and I get an Fatal Error!!

When I play the video i made from FS recorder I get an error that theres isnt enough memory??

My new PC is:

Motherboard : Asus Sabertooth X79

CPU : Intel 3930K socket 2011 (max temp. 65 c on a one hour flight)

Videocard : 2 x Asus geforce GTX 460 SLI (max 55 c on a one hour flight)

Memory : 16 GB G.Skill Ripjaws-X CL9 1866 MHz

HDD : Western digital

OS : Windows 7 ultimate 64 bit version.

Shouldnt this be enough to record in HD(1920 x 1080)?

Anyone have an idea what the problem could be?