Invalid CUE SHEET command at line 4

[rjrepair]

I am using Plextor PX-712UF and done very good so far.
I downloaded some songs CD+G from a Karaoke group I belong
The files comes to me in MP3 format as well as CD+G format.
Once downloaded I tried to make a CD+G so I can use it on my Karaoke player
and I get this message " Invalid CUE SHEET command at line 4...... Previous file is not a multiple of the specified block size "

That will happen if I try to copy even one song out of the lot.

Also this same message will pop up on trying to copy a good CD+G CD
Works well if there is a problem on the last song on a CD+G that is protected.

What is the meaning of this new error ( To me anyway )
Is it a different protection?
Thank you.

PS: I am using Windows XP