iPhone 3G doesn't recognize the SIM Card after Jailbreak

Well, basicaly as the title says.

The problem is this:

I jailbroke a friend's iPhone 3G with QuickPWN, windows version, aparently the Jailbreak was a success. But when I try to boot, the iPhone doesn't move from the boot screen.

So I decided to make a force restore, and then Jailbreak again. Now it really was a success, but for some reason the iPhone doesn't recognize the SIM card. It says: "Sin Servicio" (No service).

This is strange, I have jailbreak my iPhone 3G and a friend's and this didn't happened.

Can anyone please help me solve my problem?

I would really apreciate it.

^
Actually, I dont remember checking those options (Not just with that iPhone, but for the 3 iPhones i Have jailbroke).

Can you (or someone) please put a image of that step?

Thanks a lot dude.

O and BTW, does the QuickPWN Mac version works the same?

^
Thanks, tomorrow will try it and post how it went!