Captive never did work right and ended destroying a lot of data. I suggest that you try some other approach, such as saving files to a FAT formatted device or across a network (using Knoppix Konquror as an FTP client and transferring to a FTP server set up on another system on the network). Knoppix has been able to read NTFS safely since it's release, but writing to NTFS does not turn out well.