Did you use the 'verify' option to check the burning result inside the burning program?
And what is KIS 2012?
I burn data on DVD-R. The burning process goes well and at the end I get the message that it was successful. But when I insert the burned DVD it shows nothing, used space - 0 bytes, free space - 0 bytes. It is reading previously burned data DVD and other CDs. I used Ashampoo free burning 6, Nero Lite and today used CDburnerXP. My laptop is Windows 7 ultimate 64, Intel i3. I doubt this is due to KIS 2012. About a month ago I was using Avast free and back then there was no such burning or reading issue.