Trouble with burning ISO files to DVD

I’m having trouble burning my ISO files to a blank DVD. Everything I have is compatible and I know how to rip the DVD to my computer. However, my problem is when it comes to burning the files, I go to the source selection but it wont let me access the folder where I have my ISO files saved. Anyone else have this problem? I’m new to the program, before I used DVD Copy Tools and that was a clutch program, only problem is that it’s outdated now. So basically how do I locate the ISO files to burn to the blank disks using Clone DVD?

Also does it matter that I use windows vista?

could always try burning with imgburn