As said, better to leave the burning al alone. Try a diff burning appn to make sure its not Nero.
@sureshpaladi
PC Specs?? OS??
Try this it shud solve it
My Computer > Hardware > Device Manager > "Click/Expand" IDE ATA/ATAPI Controllers.
Then "Select" Primary IDE Channel > "Right Click" Properties > Advanced Settings > Transfer Mode "If its "PIO Only" change it to "DMA if available". Do the same for "Secondary" if its there.
If your not able to select or switch to "DMA Mode", "Right Click" on Primary IDE Channel and "Uninstall" it. Dont worry Windows will recognize it in next boot-up