[Techtalk] CD-RW writing w/ BurnCD in FreeBSD 5.1

[Noir]

According to the burncd manpage I have issued:
 
"burncd -f /dev/acd1 data file_name fixate" to write some CD; the process
went fine...but now I cannot mount (mount /cdrom) the CDs any longer -
neither in FBSD nor in Windows.
 
It says: "cd9660: /dev/acd0: Invalid Argument"

The system is FreeBSD 5.1. Any kind of help would be much appreciated.

Noir.