CDRW missing data

[dboy]

I was using a CDRW disc with directCD. I put ~50 meg of data on the disc, read it in another computer. Few days later, I put another couple hundred megs onto the disc (same computer as the first time). Now on any computer I put the disc in, only the first batch of files appear. The disc free space indicates that the second round of files are there, just not showing up. Any way to get the computers to recognize all the files?