help..

i juz managed to downgrade mine n8 to pre pr1.0 after using belle. however, i cant update my n8 to pr 1.0,1.1 or 1.2 through NSU or Ovi Suite. Its said there is no update found for my n8 product code 059B288.. can someone help me regarding this because i follow the downgrade tutorial and it said it can be update to any latest firmware..tq