If your backups worked before, make sure all stealth settings are correct in ABGX360 v1.0.5 to confirm with the new dashboard changes. Also the latest iXtreme LT+ 2.0 firmware is important. Checkmark...
1. Options: Check create dvd file
2. Check stealth. Verify if stealth passes
3. Check fix video padding
4. Check for AnyDVD. Check game partition CRC
5. Check for updates
6. Autofix: Autofix threshold level 3. Make sure you download 8-13th Wave here -
http://www.abgx360.net/download.php. Place in C:\Users\\AppData\Roaming\abgx360\StealthFiles and C:\Program Files (x86)\abgx360
7. Misc: Splitvid add if it doesn't exist
8. Click Launch button. You should get all green for stealth verification and Game CRC + Splitvid
And then use Imgburn to burn at 2.4x or 4x. Make sure to disable UAC so you don't have to run as admin, or else ABGX360 will cause problems. You are going to need antivirus protection later though.
To get a drive letter in Device Manager (scan for hardware changes)/My Computer, this has something to do with creating one manually in Computer Management. Also has something to do with reinstalling the VIA drivers if removed. Check here for manuals that explain all this -
http://jungleflasher.net/downloads.html
Latest
Xbox Backup Creator available here: http://dwl.xbox-scene.com/xbox360pc/dvd/Xbox_Backup_Creator_v2.9.0.345.zip