UIloader can't find images

ok her is my problem I am building a site in Flash cs4 and I’m a the part where i want to add my photos so I have inserted a UIloader to load my images and I have set the UIloader to pull from the images folder and it just keeps giving me an error message cant find images which I cant understand why cause the Fla file is in the same folder as the images,here’s the part I really cant understand if I rename the images without numbers then it finds a couple of them??? I have always done it this way in the older versions and I know it works in the new version I have spent hours trying to find out why and have asked many people and they cant tell me why… So I’m asking you all for some help if anybody knows why or can help me fix this problem then please do…