Default [Q] SIM Unlock for Free ?

Hi, I search any solution for Unlocking my HTC Dream 200 Orange France.

I have make an "Config.dat" and it's contents is :

My IMEI is 352778030068XXX

Code:
0 0 pts/5 [17:15:46]$ Galoula@DAUBE:/Donnees/Temp/ cat -A Config.dat 
!^@^@^@^W^@352778030068XXX85391724^F^@22701F0 0 pts/5 [17:15:47]$ Galoula@DAUBE:/Donnees/Temp/
I have tried to enter "85391724" but it's not works.

What is the algorythme to get this unlock code ?

Thanks.