As others have stated you must provide specific information of the errors if you expect help. Do yourself a favor and never post your email address unless you get satisfaction from a mailbox full of spam.
Also verify that you are using CloneDVD2 from Slysoft or Elaborate Bytes with version # 22.214.171.124 and not the CloneDVD V 3.5 which is another program that is using the CloneDVD name.
You said "I use memorex media & have had no failures.I suppose it depends what type of burner you use."
Burner has nothing to do with crap media, if the media is junk the best burner in the world will not help. Not all Memorex media is bad, you have to research and find the best ones, Memorex puts their name on many manufactured media, some decent, some real crap.
I'm sure the burn went well for you, but maybe 6 months from now when you play that DVD again it won't be so good due to the dye breaking down.
You should visit the Media forum at CD Freaks and learn what media is good for your specific burner. As bjkg mentioned about DVDInfoPro, this program, or similar, is a must have if you want to verify you are using decent media.