Copied DVD jumps in DVD player - help!

Manufacturer ID: Verbatim
Media code MID: MCC 004 (000)
Sony dvd player: SONY DVP-NS305
clonedvd (elaborate bytes)

i havent tried playing the back ups in a different dvd player. unfortunately i dont have access to one at the moment but that wud certainly help to root out the problem.

i have been running the scandisc program on many of my backup dvds and all come out with no errors.

i have provided above the disc information you required. many thanks for your continuing help on this matter.