Older DVD players in particular sometimes have trouble with certain formats. One good place to check out your DVD player is over at VCDHelp, where they mantain an extensive peer to peer compatibility list of which CD/DVD players are capable of playing what format and to a more limited extent which media has been tested.
Ok............I just went out to the car to try that dvd player and it works fine. the only other dvd player in the house that I have is indeed about 3 or four years old, I even tried my PS2 and that did not work probably because it is older as well.
I'm burning at like 2.4, burning with dvd architect studio, latest firmware, it always works fine off the pc, and I have only tried TDK discs.
I'm gonna go to my neighbors and try his newer dvd player. I will def. use that site you gave me. Thanks for your help.
Last year a report showed -R to be more compatible than +R; I think the numbers were something like 95% to 85%. Also, it does make a difference which brand you burn. I love the Ritek G05 (8x) product and it's been bulletproof for me over hundreds of burns. If you buy then at places such as www.meritline.com they're also dirt cheap--$.35 each in quantity.
As I think you have just found out... the problem is not with the _uking software.... it is with the DVD player and/or the brand of DVD disks you use.
You do NEED to spend some time researching this issue. DVD (disk) / Player compatability is just about the number one issue that is talked about when producing burned DVD's.