Help For Mod Kit Thread - WIC: Modern Warfare Mod 4

Sorry for that I'm not posting a thread directly about MW2,but after I played the mod I began to try to make my own Mod.

I'm new to WIC mod, my WIC version is 1.0.1.1(with Soviet Assualt), and I have WiCEd 1.002 and Modkit V4, at first everything goes fine,I used juicemaker to open and modified   unittypes_wic.juice,   I saved and got
unittypes_wic.ice,  unittypes_wic.loc,   unittypes_wic.lock,   unittypes_wic.hash.

As the help document instructed,I use Winsdf to creat a new sdf called cyctest.sdf and put

unittypes_wic.ice,  unittypes_wic.loc,  unittypes_wic.hash  
 into the file. I put the new sdf file in
C:\Documents and Settings\All Users\Documents\World in Conflict\Mods\cyctest
together with modinfo.ice and modinfo.loc.
Then II open my WIC.exe from my install root(for I cannot start game in Modkit root, and I don't know the reason),select mod, creat local server,selected a map and started,and while I'm loading the map, windows said that World in Clonflict has encounted problems and needed to be shut down, then it throw me back into the desktop!

So my problem is:
1.Why I couldn't start my game after applying my mod?(If the mod is unloaded,the game started normally)

2.What files should I contain in my sdf file if I just modded unittypes_wic.juice?

3.If you don't mind, I also wonder why I can't run game from my modkit.

Thank you in advance and sorry for the troubles I'm causing you.