XP1800, Gforce 4 Ti 4400 - Dreamfleet 734 freeze my sys

Hi,since i bought the following system:==Windows XP Professional (5.1 - 2600)CPU [AMD XP 1800+ (1-AMD , 1533MHz, 256KB)]Video Card [ nVidia GeForce 4 Ti 4400 (128 Mb DDR) ]RAM (DDR 266 MHz) 256 Mbs==I can't fly with my DF734 because when I'm doing the start procedure (or taxiing or taking off) it's always freeze my computer (I can't move the mouse, I only can push reset button).I have tried with different drivers of the videocard (CD and latest Detonator) and tried it without the soundcard installed (SB Live 5.1), also I have changed the RAM module.Days ago I formatted the HD and before install the SO and imprescindible drivers I tried it with the same results.What can be happening?Best regards,Marcos.