Make sure you used Hash Block Calculator or Modio to rehash/resign and it should work

Just drag the new modded folder into content where all your other profiles are don't drop it in a folder with the same one 8)

Yeah do what he said but what are you using Xplorer 360 or Xport 360? If you tell me I can help you.

he has to rehash it and resign that what happend to me at first....

Mkay so i finish modding it then i rehash and resign drop it itto the same place as it was be4 amd de;eting the old 1 and it didnt work? thats what i was doing be4

Xport 360 i used

when you rehash and resign drag ur modded profile into where all ur other profiles are saved ( dont put it inside a profle) sign in to xbox live on mw2 it should say "your profile is not aloud to play online" so it will bring up a screen so pick the account which has been modded and there you go

hope this helped

ok sometimes when you put something like a profile back in to Xport 360 it freezes sometimes, so as soon as you drop it in there and it is done copying you need to unplug your hard drive and when you mod it it should create a whole other profile on your desktop like E000314 and a bunch of other numbers. you need to rehash/resign that and in Xport 360 you know where it shows all of your profiles you need to drag the E000314 or something like that from your desktop, the whole thing!!, dont click on it and open it up and drag that drag the whole thing. It should create a whole new profile on your hard drive and that would be the modded one.

it means your profile is corrupt, go to the sytem setting and memory and delete your profile, but make sure you know your account email address and passwrod and gamertag, and reover it.
also if you mod it again just make sure you rehash and reign in modio

Okay But then would that make it so i can only go on the modded 1 on multiplayer if it says im not allowed to play online?.