Ascathos asked first question, I will ask second one: do you have all files together in one MPQ? Make sure you have no map files in other MPQs than the one where they are supposed to be. For instance if you keep all your files in patch-4.mpq and have a few ADTs in patch-3.mpq, this may just happen, extractor will look for WDT in patch-3, won't find it and here your problem comes. Similiar things already happened to me.
