Going online?

So I have a MI bios 1.54 installed and I bought the original copy of BF: modern combat (yes i do occasionaly buy original games) and I can't go online, it gives the error of a wrong DNAS code so I was wondering if there were any tools or some kind a bios or tricks so I can still go online with bf? That would be very nice

Thank you

You have to turn off/Disable the modchip when u wanna play ONLINE with original discs...when turning on ps2 Press and HOLD start until you see the writting DISABLE screen appear...then reset the ps2.