DVD drive detected but not working in windows

I am using Lenovo 3000 G400 C-Notebook with an operating system of “Windows XP Professional Service Pack 3”. I have also installed “Nero StartSmart” in it. I have no problem in writing and reading of a CD with DVD-RAM Drive. But I am facing a problem that it doesn’t work on DVD. I am unable to read or write a DVD on my computer.
To resolve the issue I have also tried to uninstall the” Optiarc DVD RW AD-7560A” from the Device Manager. But it does not work out for me. Please help me to resolve this issue.
