Samsung SH-D163 ODDs on GA-P55A-UD3 motherboard won't write

[xtab]

I built a PC using the Gigabyte GA-P55A-UD3 motherboard, and installed two Samsung SH-D163C SATA ODDs.
I installed all the motherboard drivers, including the Marvell console.  The OS is Win 7 64 bit (although I had the same problem with Win 7 32 bit too).
Nero7 Smart Start came with the ODDs so I also installed that.
I can read from the drives but can't write to either of them (which is what makes me think it's a mobo/driver problem, not a hardware problem with the ODDs).
I ran Samsung's WinInquire tool and checked that the latest firmware is installed (SB02).
When I run Nero, neither ODD is shown in the list of available writers - I just get the 'emulator' option.
Has anyone else come across this problem and can tell me what I need to do/install to get them to write?
 
Thanks

[Dark Mantis]

Hi

What ports have you got the drives connected to ?

What mode are the ports set to ?

[xtab]

Embarrassed to discover that these aren't DVD writers.  I didn't think anyone still made ODDs that were read-only any more but apparently that's what these are.
Thanks for the reply though.

[Dark Mantis]

Hey we all make mistakes and often rather embarassing ones! As you say you just assume certain things at times and not always correctly.