Republic Commando not working

[DADC]

Man I got myself this game and i tried this whole motherf***** day to crack this damn f***** up s***. I tried all the cracks and readed all the threads but it still doesn't works.
I can start up the game and beginn a new one. but then in the first mission, where u have to use the bacta, the game freezes and my pc restarts. ******* **** *****.
So what's the problem?

I've got Optimum hardware ressources and set high preferences.

My drivers are all recently updated and i got sp2 on xp.

Can smbdy pls help me.

I tried to crack it for 6 hours!!!!!!
And i can telll u that I'm not a noob in cracking. I do this s*** for already 4 years and this is the first game that I can't crack!

I need help, please help me!!!!