burncd question

[kisha at lissaganda.com]

%uname -a
FreeBSD SOULFLY.BACK.TO.THE.PRIMITIVE.PH
5.2.1-RELEASE-p8 FreeBSD 5.2.1-RELEASE-p8 #0: Mon Jun
21 14:53:05 PHT 2004    
dataholic at SOULFLY.BACK.TO.THE.PRIMITIVE.PH:/usr/src/sys/i386/compile/MMP  i386

cd-RW dmesg: 
ata1-slave: FAILURE - SETFEATURES SET TRANSFER MODE no
interrupt
acd0: CDRW <SONY CD-RW CRX185E1> at ata1-slave BIOSPIO

SOULFLY# burncd -f /dev/acd0 -s 12 data downloads.iso
fixate
burncd: ioctl(CDIOCSTART): Device busy

SOULFLY# $ ls -l /usr/sbin/burncd
-r-xr-xr-x  1 root  wheel  18196 Jun 24 17:51
/usr/sbin/burncd

i always get this message, when i attempt to burn an
.iso, anyone whats this error is all about, my sony 24x
burner is fine when i burn files from my windows XP
which is my first partition, i hope anyone can help me
fixing this problem, thanks ;)