panasonic bd35 and back up disc

[marky.b]

if i play a downloaded dvd file, ie: avi dvd rip that as been converted to dvd using xlisoft all dvd players will play it.
but my new panasonic bd35 will not. it plays all other dvd copys that i have had for ages off other people,
but it seem to have issues with these converted avi ones
i also have a contact for blu ray copys. i have 2 here . the films are ripped to dual layer discs. the pic is blu ray quality. but there is no extras incl subs etc. the problem i have with these discs are i can only play the film. no ff or skip chapters, if i try the d isc freezes then goes back to the beginning
any ideas on these 2 issues

[budz]

buy the original blu-ray discs.

[Krispy Kritter]

The problem is with the copies. And I agree, buy the damn discs.