I'm having the same problem with my SOHW-1633s but my Board came with the 5.10 on the CD so I don't have the 4.27 drivers, i've been looking around on the internet and haven't been able to find them.
The DVD Writer will read all data DVD's but will not recognize any DVD with a DVD-ROM Booktype. I haven't tried burning yet as I've just upgraded my whole system.
With the 4.27 Drivers is there a way to remove the 5.10 without completely wiping the hard drive and doing a fresh install. I've found a Nvidia Chipset Driver that says 4.27 but when it installs the default directory is 4.24 which makes me suspect.
Update: I'm currently using a AMD 64 X2 Dual Core 3800+ CPU with an Asus A8N-E motherboard. Windows XP Pro 32bit, SP2 Installed. 140Gb WD HD