In case its a version issue with your patcher, I uploaded the exact copy that I used (downloaded from ds-scene) If you aren't comfortable downloading it from me, feel free to head over there and grab it.
http://www.yousendit.com/transfer.php?acti...CBF656375692C6D
Hope this link works :x...
To those having trouble patching with dslazy/arm7, try using Arm7 Patcher 1.0. When I unpacked the ROM using dslazy, it reduced the filesize from 128mb to 106mb and I received the data error regardless of re-packing with the new arm7. Arm7 Patcher 1.0 bypasses this, so no problems here...