I made a small application with the help of PhpMaker(php,mysql). It is a kind of catalogue for a paper issued monthly. It stores data for the authors and the articles and the paper itself in pdf. It works fine except for uploading the pdf. Interestingly enough uploading works fine when it runs on localhost, but on the server "in action" it just wont upload. No error message. The two source code(on the server and the localhost) are identical. What should I check to make it work?