Skipping, stopping, and lack of writing

Someone please help me! I have been using clone DVD 2 for well over a year with very minimal problems- until now. One of my computers is having a problem with creating skipping disks, or even worse sometimes they will get about 40 minutes into my backup copy and just freeze.
I have tried to write them on my second computer. They will go through the reading process, and then when it gets to the writing process it just says “please insert media”. I have inserted new media. The files are not too large to be put on the disks I am useing. I have tried cleaning the DVD burners, uninstalling and reinstalling clone DVD 2… no luck. Anyone have any ideas?

Sounds like a media/or firmware problem.
However, you need to post more info, for someone to help.

Also what for a burner you’ve used?