handling files error

Hey guys, I have a red hat 7.3 server running apache and php4. It all seems working fine, but when I try to upload a file through a form I got nothing. I mean, I can ouput the temp name of the file, the final name, size and other stuff. but some functions don´t work. Like If (!is_executable($userfile_temp)) -> this don´t block executables files. if I change to If (!is_executable($userfile_name)) -> it´s point me that all files is executable. and when i try to move the file from /tmp directory to another directory with move_upload_file function. This func. doesn´t do anything, and doesn´t move the file to the specified directory any help are welcome []´s Iced Sun