It seems to be a problem with creating the necessary folders in the 'Data' directory. I created a category yesterday with an index of '1' and I saw there was a folder named '1' in the data directory after I added an ad. I have since deleted this category and the subsequent categories I have added will not add the folders. Is there a field in the table 'pp_categories' that needs to be set to a certain value to make the new folders? Just kind of stabbing in the dark here as I really have no idea what I'm doing.