Problem Recording with EAC

When trying to write to a CD-R using EAC, and after ejecting the original disc, I insert a blank disc, press the WRI button, select "Load CUE Sheet" from the File menu and then select "Write CD" from the CD-R menu. The program begins to write for about 4 seconds, then displays the following error msg window. . .

"Write error!
Write blocks:
Logical unit not ready, long write in progress"

Can anyone explain what is happening, and how I can correct this problem?

Thanks.