Men of War Lag problem

[Mikro]

Hi, i have a problem with men of war direct control in singleplayer.
The problem is when i press and hold ctrl for more than 3 sec the Unit starts to behave strange. the mouse pointer moves slower than usualy, the shoot click is laging and when i rellese the Ctrl it wont dissengage for several sec. and if i hold down Tab (item highlight) or Ctrl and try to move over the battlefield i expirience lag.

I need Help!

i use windows Vista,Geforce 8800 Gts 512ddr3 Dual core 3.0, ram 2gb ddr3, all drivers are up to date. windows preformance test is 5.9.