DVD X Copy Platinum error

i have DVD X Copy Platinum version 3.2.1 and it has been working fine since now. Both in simple and advanced mode it starts the reading stage of the DVD. Then once it has finished reading, it asks you to insert a blank dvd, i insert a blank dvd and wait til the button goes green. I press the green button and then it comes up with an error saying “Error writing to disk”. So i look in the latest log file and it says “Files are too big to fit on a DVD+/-R(W):” etc.

I don’t know whats going on. I have reinstalled DVD X Copy and Rescue a few times to no avail. I have also reinstalled Patin Couffin.

Can anyone help me?
Any help would be greatly appreciated
Thanks in advance