Problem with CCE while creating DVD from AVI

hello everybody;
lately, my DVD2SVCD (version 1.2.1.1), with which I usually create DVD from AVI, gives me the following error: “according to the registry, the type of file specified in AVIFileOpen does not have a handler to process it” while starting the video processing by CCE.
I thought it had to do with video codecs, but I re-installed both xvid and divx codecs, to no avail - both formats keep giving me the same error message.
Any ideas? ChickenMan, I know you’re the man for this sort of questions (your guides are a bible to me!)! Please help!!