If you installed D2SRoba/D2S122B2.zip as a fresh install please read inside

[dvd2svcd]

Because of some unlucky circumstances D2Sroba and DVD2SVCD doesn't quite agree on how to install the AVISYNTH.INI file when doing a fresh install. There's two solutions:

1. Uninstall DVD2SVCD. Reinstall 1.2.2 Build 2 without D2SRoba. Run dvd2svcd once. Install D2SRoba.

2. Uninstall DVD2SVCD. Download d2s122b2a.zip and install as usual.

[pacohaas]

is this fixed in the B3 installer?

[dvd2svcd]

Yes :)