Cannot mount CDs or DVDs

I'm having a problem mounting both CDs and DVDs. I just installed FreeBSD 7.1 on an HP Pavilion DV9825nr laptop.

When I attempt to mount a known-good CD or DVD using the command
Code:
mount /dev/acd0 /cdrom (following the FreeBSD handbook and all other commands in it)
and I get the following error:
Code:
mount: /dev/acd0 Invalid sectorsize 2352 for superblock size 8192: Invalid argument

$ dmesg | grep acd0 shows:
Code:
acd0: DVDR <TSSTcorp CDDVDW TS-L632N/0503> at ata0-master PIO4
my /etc/fstab
Code:
/dev/acd0   /dvdr    cd9660   ro,noauto 0 0
When I run "cdcontrol -f /dev/acd0 info
Code:
Starting track = 1, ending track = 1, TOC size = 18 bytes
track     start  duration   block  length   type
-------------------------------------------------
    1   0:02.32  60:14.05      32  271055  audio
  170  60:16.37         -  271087       -      -
which is correct.

Can anyone help with this? Thanks in advance.
 
ale said:
Are you trying to mount an audio cd?

I'm trying to mount anything. Data cd, music cd. I've tried CDs and DVDs. I still get the same thing. The drive worked with Windows before I reformatted.

I did fail to mention that my laptop is a 64bit Dual core, but I'm using the x86 version for the NVIDIA accelerated video driver. Not sure if that causes a problem.
 
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