smoke

Hi all, I'm new here, I'm having trouble to burn a DVD with original regional code 4, that the original DVD is code 4, I use DVD decrypter ripped to ISO without touching the RC, but it always ended up with a region free ISO. Even I extracted the image to VIDEO_TS, then patch all .ifo's to code 4, there still be an error with miss match control data and main data code. Any input? Thanks.