ISO Short

I know that a lot of you veterans probably get a ton of noobish questions all the time, but I'm trying really hard, and being as patient as possible

I finally decided that I'm going to back up some of my games with my desktop computer, so I rigged it all up and opened up my disc drive, the full 9 yards. I ran it through wxRipper, but it failed initially. I found a guide on here saying to make the part not working into a dummy instead of a copy. It all seemed to go right and I didn't encounter any errors my second time through. But finally I have my ISO, and I change some settings on abgx360, and run it through, it makes a .dvd file, but says "Warning: This ISO is short 2048 bytes! Part of the game data is missing! (should have been at least xxxxxxx bytes)
Game partition offset: 0xFD9000
Root sector: 1783935 (0xE00CF800), 2048 bytes
ERROR: the root sector is blank!


Now I'm just lost, checked a bunch of different stuff and couldn't find anything, so I was hoping someone could please grace me with a response, it will be much appreciated.

Thank you,
Kroger