some good info on the xbox scene site settings might just work out check them out here
tips
I use these settings now, recommended by Lightning UK (the creator of ImgBurn): –
1. Clear OPC history using EEPROM Utility and power cycle the drive.
2. Enable Smart Burn and Force Hyper Tuning.
3. Disable Over Speed Writing and Online Hyper Tuning.
4. Disable OPC in ImgBurn.
5. Burn at 4X.
In your case, as you just started using a new spindle of discs, it could be a bad batch, but give those settings a try anyway
Xbox World 