dvddecrypter demux error

[Lev]

all of a sudden i'm getting an dvddecrypter error while demuxing my dvd with doitfast4u..

i'm demuxing a dvd9 .iso that i've mounted with daemon tools..

i get the same error with different dvds that i demuxed before without problems..

what could be the cause of this error?

screenshot of the error:
http://www.patsboem.com/stuff/error.gif

[setarip_old]

1) See if you also get an error by trying to demux with SmartRipper instead of DVD Decrypter

2) Can you PLAY the mounted .ISO?

(BTW, it appears that you are not using the most recent version of DVD Decrypter - version 3.54)