strange permission errors

I have a PHP script that uploads an image, and uses ImageMagik to create a thumbnail. SO far no problem. The upload and thumbnail generation piece work great. However, if I try to either unlink the image or do a 'rm' through exec, the image doesn't get erased. The images are created in a world-readable and world-writable directory (777) and they are owned by nobody. I've even gone so far as after the upload and thumbnail generation, chmod the images themselves to 777. However, I am still unable to delete. Could anyone give me some suggestions as to what to look at? It's a hosted environment, so there may not be a whole lot I can do about it... Joseph E. Sheble a.k.a. Wizaerd Wizaerd's Realm Canvas, 3D, Graphics, PHP/mySQL & ColdFusion/MSSQL http://www.wizaerd.com ================================= The Canvas Expert Online The #1 Resource For Canvas Information http://www.TheCanvasExpert.com =================================