Problem playing Divx

Hi guys,
I’m new to the forum. I have a samsung dvd±RW/DL that I use to burn divx movies on sony dvd+rw. It plays fine both on the computer and my LG dvd player for the first time or so. Then, when I try to play it again later, like the next day or a few days later it won’t play on neither the computer or the dvd player. It starts then it freezes or skips. Now this is the part that gets me, if I reburn back on the same dvd+rw it works again. Can somebody explain this to me?
Thanks for the replies,
Pascal

Forgot to mention that I use Nero software for burning.