You might try looking in the directory that the script resides in then.
Alternatively you could change the php.ini (if you have access) to something else.
error_log = syslog
would put the errors in var/log/messages on *NIX, and in the Event Log on Windows.
error_log = /path/to/filename.ext
examples:
error_log = /var/log/php_errors.log
error_log = "C:\inetpub\logs\php.log"
Would put it where ever you wanted and with your own custom filename.
Changing it and then trying the script a few more times should populate it with any errors that the script is generating.
