iGTD and iCal syncing problem (To Do and Events)

I use iGTD with iCal. I think that GTD concept rocks, in fact I couldn`t find any better. But I have one problem - it is syncing. Every time I want to sync my iGTD stuff with iCal, the tasks are transformed into To-Do`s without start and due date (although I enter them in iGTD) It is really a mess! Am I doing something wrong?