It is strange that this is only happening with one DL06 and the rest work fine. Are you loading the exact same DNLoader file (.DAT) into it as the others? If so, and you have the means to do so, you might try "jiggling the handle" (i.e. clearing the DL06's memory, including the scratch-pad) and trying again. If it is a different .DAT file, perhaps it is corrupted? You might have a new .DAT file created. Or, you could send that .DAT file to me and I can see if I can duplicate it here on our DL06s.