#9 Exception: Error reading CD

[Matt Mower]

CUERipper 2.1.4
Windows 7 64bit
LG GGC-H20L with FW 1.03

When I rip discs, the first one rips without any problems. Every subsequent disc I try to rip loads up in the program just fine (metadata pulls ok), and when I hit Go the gaps are read by the program, but before ripping begins I get "Exception: Error reading CD". I can hit OK at this point, and when I try again it rips just fine.