VideoStudio :: Pro X5 DVD Burn At 4x Won't Play On Older DVD Players

I've burned some DVDs with ProX5 on the slowest speed 4x and someone I gave it to says it won't play correctly on his older stand-alone DVD player hooked to his TV. I had originally burned them at 16x so reburned it at 4x. He says it starts to skip and stop about mid way. I am not using dual layer DVDs. He says they play fine on a friend's newer stand-alone DVD player. I'm thinking it's a problem with older stand-alone players.

These DVDs play fine on my computer and my stand-alone DVD player hooked into my TV. My player is newer with Blue Ray although my project is not Blue Ray.

Also one thing I've noticed is when I set the burn speed, burn the DVDs, they complete, then when I go back and check the burn speed again it is not what I set it at. Does this mean ProX5 burns them at whatever speed it wants despite where it's set? I tried seeing the burn speed after the fact thinking I could see it in my Nero11 disc analysis but it does not give me the burn speed.