Page 1 of problem playing dvds on lg home cinema from safeway....please help???

hi folks i cant seem to play dvds on new lg home cinema system from sayeway(da-3520 model)the discs im trying to play are original region 2 discs,but when i play copied discs region 1they play without any problems,any ideas how i cant play original discs???originals are also pal format and copies are ntsc format ive tried the region hack in these forums and it seems to let me change the region setting but when i play the disc it stops and says check disc,please help,
and sorry for boring yous in advance :)
many thanks