Hunting Unlimited 2011 PC Gameplay

Hunting Unlimited 2010 is better.
HU 2011 gameplay is terrible,animals are moving very badly.
Settings High

Specs
Processor Intel Core 2 Duo E6750 2.66GHz @3.2GHz OC
Memory 2048MB RAM
GraphicsGeForce 8800 GT 512MB OC
HDD 640 GB
CaseAkasa Zen 650W
OSWindows 7 Ultimate