I have been using this program for a little while now and it has worked amazingly. Now, it doesn't. Check this log. Also, I posted a picture with the exact error message.
I 11:59:31 ImgBurn Version 2.4.2.0 started!
I 11:59:31 Microsoft Windows Vista Home Premium Edition (6.0, Build 6001 : Service Pack 1)
I 11:59:31 Total Physical Memory: 3,133,904 KB - Available: 1,755,216 KB
I 11:59:31 Initialising SPTI...
I 11:59:31 Searching for SCSI / ATAPI devices...
I 11:59:31 Found 1 DVD