Finder not recognizing external disk drive

Hi
I have just bought a Firestorm external drive to burn CDs. Attached it without any problems but as soon as I put in a blank CD it comes up with the message "You cannot burn this disc in the Finder because the disc drive is not supported".
There's no problem with viewing pre-burnt CDs in the drive, it just seems to be read-only at present.
Do I need something else - driver/other CD writing software?
Thanks
Berryman

Thanks both for the advice.
I ordered Toast as I hadn't got Patchburn to work previously. I decided to give it another go tonight and typically it worked fine and the CD is now writing perfectly.
Cheers
Berryman

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