I am using moodle 1.9.3 (Build: 20081204) and after making the upload of some files to resources, I cannot open PDF, XLS, PPT, WORD, ZIP, etc files that have more than 1 MB. I can make the download, but when I try to open, the files are corrupted. If the file have less than 1MB I can open without any problem. If i make a link to a URL with this files, I do not have a problem.
My config.php and theme config.php do not have any space or line after the last tag.
What could be the problem?