Problem When Movie Is On Disc

Ive just downloaded a film in nzb,extracted the files than put the film through nero onto a disc,when i play the dvd in the dvd player the film sometimes comes up in vob,or it would show dvd.
Then sometimes it would say please insert a playable disc,any reason why this is, also just over half way through the film it seems to freeze and would go back to the start.
So i tried to play the dvd through my pc but there seems to be no files there,so i decide to just play the film from the file i downloaded through my pc upto the point where it had frooze on the dvd just to see if there was a file i missed whilst downloading,but it all seems to be fine,it did not freeze it played all the way through.can anyone shed some light as to what coukd be wrong.
Many thanks.

What format is it in .img .iso etc.., What software did you burn it with (my bad i see you used nero).

I downloaded the nzb file from you,and i put it through nero.
I tried to put it through dvd shrink but it would not accept it.
Is all i know it is vob on the dvd.

Its an avi format

You can't put a avi through dvdshrink, You need a avi to DVD converter software, Check the guides here

But dont nero convert it for you?

Yes, But i wouldn't recommend it, Its most likely the problem, Try something else like VSO ConvertXtoDVD, That seems to be widely used and popular.

Thanks ill try that,after shall i put it through shrink?

No, DVDShrink is only used for DVDS, ConvertXtoDVD converts it to DVD and also burns it to DVD For you, Follow this Guide.

Do you have a DVD recorder Tony? If you do have one it's best to just download the film in DVD already so you don't have to convert the avi file to DVD format.