iSync quits before it syncs...

Does anybody know what causes my problem with iSync where it quits before it syncs anything? (Well, actually, it looks more like it crashes, but it doesn't display the 'submit report'-alert after doing so.) I already trashed my preferences, but that didn't work. I tried syncing in another account, but iSync crashed there too. So, I figured it must be the application itself, so I installed a fresh copy, but even that didn't work. I don't know what to do now. Of course, just exporting my address book (when something's changed) to a single *.vcf-file and dragging it to the Contacts-folder on my iPod works quite well, but that's not how it's supposed to be.

Does anybody have any suggestions or even possible solutions? Might bringing over a copy of iSync from another computer to mine work? I did that once with a printer driver and that worked like a charm, but I'm not sure if copying programs works just as well. Of course, I can always try. The thing is, though, that I've formatted and re-installed my Mac when Panther came out, so I don't want to go through all that again.

Anyways, thanks for the help (in advance)!