pdf_open_image_file says it can't find file, altough it's there

Hi After upgrading to pdflib-4.0.1 from 3.x (and php 4.0.4pl1), both pdf_open_gif (deprecated) and pdf_open_image_file say Could not open file, although images are there and they were working before. Someone else had this problem too http://www.php.net/manual/en/function.pdf-open-image-file.php Any help please ? I couldn't find the solution in arhives and google. Thanks! -- Marius Andreiana